A DTC is the result of a system or circuit failure, but it does not directly identify the component or component that failed. Insufficient flow of secondary air injection detected during aspirator test. To avoid disappointment and to return your Jeep to service as soon as possible, you should know the simple reasons for the check engine light to illuminate. 6. Fuel Injection pump controller P1287 supply voltage is low. MAP sensor input voltage out of an acceptable range detected during reading of barometric pressure at key-on. Do I need to something since I unhooked the computer? [ Honda ] [ Hummer ] [ Hyundai ] External temperature sensor input above acceptable voltage. EGR position sensor signal does not correlate to EGR duty cycle. Is It Legal To Drive With My Jeep Doors Removed? Can dealers see cleared codes? Exhaust Gas Recirculation Sensor A Circuit High. Evaporative Emission Control System Leak Detected (medium leak), A 0.040 leak has been detected in the evaporative system. only). Sensor supply voltage for ECM sensors is too low. Incorrect input state detected for the Leak Detection Pump (LDP) pressure switch. Web 2014 jeep grand cherokee summit 4x4 3.6l v6. Check specific manufacturer pages on the site, as some of them, we list the OBD2 codes on those pages for those specific vehicles. Injector # 6 output driver stage does not respond properly to the control signal. A blinking light indicates that a genuine problem exists and requires immediate attention. Heated Catalyst Efficiency Below Threshold (Bank 2), Heated Catalyst Temperature Below Threshold (Bank 2), Catalyst Temperature Sensor Range/Performance (Bank 2), Catalyst Temperature Sensor Low Input (Bank 2), Catalyst Temperature Sensor High Input (Bank 2), Evaporative Emission Control System Incorrect Purge Flow. If you have a check engine light on and you know that the problem is with the gas cap, disconnect the battery and wait a few minutes. only). However, the list does not end there. By turning on the ignition in your vehicle, you can activate it. You should be able to drive your vehicle if its check engine light is solid. If ORVO is working as designed insure that the vehicle owner is not overfilling the fuel tank. Check out this video to find out how!Wan. Governor pressure greater than 3 psi when requested to be 0 psi (4-speed auto. Style Guide: 5 Slick Headlights for Your Late Model Jeep Wrangler, Guide: Choosing Running Boards for Your Jeep, A 0.020 leak has been detected in the evaporative system. Torque Converter Clutch Solenoid/Transmission Relay Circuits. Anything P1000 to P1999 or P3000 to P3400 will be Manufacturer specific and may not match the ones listed here. To check your JK Codes, use this sequence on your ignition. NOTE: The cost to diagnose the P20EE Jeep code is 1.0 hour of labor. This code can be set as the remote starter is activated and the pcm receives ignition run voltage and the tcm does not. An open or shorted condition detected in the A/C clutch relay control circuit. (A faulty gas cap may cause this code). The negative car battery terminal must be removed and any electricity in the capacitor must be drained. CODE U1504 FIX DODGE JEEP CHRYSLER FIATIf you have engine light on and code U1504 on your Dodge, Jeep, Chrysler or Fiat car we will show you what needs to be. Chrysler's number for this recall is S55. Alternative Fuel Control Module KAM Error, Alternative Fuel Control Module RAM/ROM Error, Generator Lamp L Terminal Control Circuit. Energizing Heated Air Intake does not change intake air temperature sensor an acceptable amount. GOV Press Not Equal to Target @ 15-20 PSI. EVAP Purge Flow Sensor Circuit Range/Performance, EVAP Purge Flow Sensor Circuit High Input, EVAP Purge Flow Sensor Circuit Intermittent, Exhaust Pressure Sensor Range/Performance, Exhaust Pressure Control Valve Range/Performance, Exhaust Pressure Control Valve Intermittent. An open or shorted condition detected in the speed control servo power control circuit (SBECII: external relay). Fuel Temperature Sensor A Circuit Range/Performance, Fuel Temperature Sensor A Circuit Low Input, Compressed natural gas temperature sensor voltage below acceptable voltage, Fuel Temperature Sensor A Circuit High Input, Compressed natural gas temperature sensor voltage above acceptable voltage, Fuel Temperature Sensor A Circuit Intermittent, Fuel Temperature Sensor B Circuit Range/Performance, Fuel Temperature Sensor B Circuit Low Input, Fuel Temperature Sensor B Circuit High Input, Fuel Temperature Sensor B Circuit Intermittent, Fuel Rail Pressure Sensor Circuit Range/Performance, Fuel Rail Pressure Sensor Circuit Low Input, Fuel Rail Pressure Sensor Circuit High Input, Fuel Rail Pressure Sensor Circuit Intermittent, Engine Oil Temperature Sensor Range/Performance, Engine Oil Temperature Sensor Intermittent. Scanning OBD-II signals can also provide important information when purchasing a used vehicle. See applicable service manual section (21) for solenoid assembly replacement directions. Remember that the evaporative system may also have an internal system leak. This code indicates that the EATX (Transmission controller) has an active fault and has illuminated the MIL via a BUS message. A/C pressure sensor input above the maximum acceptable voltage. Possible vacuum leak. Another way is to disconnect the battery for a few minutes. The true diagnosis must be made by an expert who has worked on the problem and repaired it. The MIL is controlled by a transistor on the instrument cluster circuit board based upon cluster programming and electronic messages received by the cluster from the PCM over the Programmable Communications Interface (PCI) data bus. Relationship between Cam and Crank signals not correct. Check the charcoal canister for fuel saturation If the vehicle has been overfueled, then there is a chance that liquid fuel can enter the canister and cause drive problems or emission related problems. An open or shorted condition detected in the short runner tuning valve control circuit. trans. No calibration voltage present from flex fuel sensor. Turn the ignition On-Off-On-Off-On within 5 seconds. The relationship between the Output Shaft Speed Sensor and vehicle speed is not within acceptable limits. Exhaust Gas Recirculation Sensor B Circuit, Exhaust Gas Recirculation Throttle Position Control Circuit, Exhaust Gas Recirculation Throttle Position Control Range/Performance, NVLD Canister Vent Valve Solenoid Circuit Low. The DRB III automatically displays a warning that erasing the DTC will also erase all OBD II monitor data. Once connector is cleaned from antifreeze contamination, review water pump for potential leak and repair as necessary. Accelerator Position Sensor (APPS) Signal Voltage Too High. How Should a Business Prepare For Easter Jeep Safari? Verify the correct DRBIII PEP module pressure transducer is being used It is critical when reading pressures with the DRBIII PEP module pressure transducers that the proper transducer is being used. May be caused by after market remote starter. 2014 JEEP CHEROKEE Technical Service Bulletins. If no codes are present then Done will appear. Decrease Engine Performance Due To High Intake Air Temperature. An open or shorted condition detected in the EVAP purge solenoid control circuit. An open or shorted condition detected in speed control Vacuum solenoid control circuit. Throttle/Pedal Position Sensor/Switch A Circuit Low Input. An open or shorted condition detected in the transmission 2-4 shift solenoid circuit (4-speed auto. A rationality error has been detected for the intake air temperature sensor. Exhaust Gas Recirculation Sensor A Circuit Low. If the code sets when the A/C is turned on go right to the bulk head connector and check for moisture. Error code: 20", then you. By incorporating an OBD-II port, which was introduced on January 1, 1996, almost all of the engine controls in cars built prior to January 1, 1996 are provided. This system works hand in hand with your vehicle's traction control system to help you control your vehicle in dangerous conditions. Neither rich or lean condition is detected from the oxygen sensor input. no more kw2000 and ISO9141, 07 chevy malibu ls:) clean all ground's 3 people found this helpful. An open condition detected In the ASD relay output circuit. MAP sensor input voltage out of an acceptable range detected during reading of barometric pressure. Other possible causes of the check engine light appearing in a Jeep include a faulty oxygen sensor, a faulty head gasket, a faulty emissions control part, or a problem with the fuel injection system. trans. Just want to make sure it's still okay to drive the vehicle until we can get this dealt with. Incorrect input state detected for the Park/Neutral switch. Open circuit between PCM and fuel gauge sending unit. Leak Detection Pump Sw or Mechanical Fault. Start the Jeep and see if the error codes are still being displayed. Certain conditions such as a loose or missing gas cap, poor fuel quality, etc. Still other codes may be associated with the jeeps accessories or features. The most common way is to use a code reader or scanner. This area is the source of many speed control complaints. Pump should be replaced if found leaking. Therefore, the bulb will always be off when the ignition switch is in any position except On or Start. Was the fuel pressure checked with a DRBIII pressure transducer? A misfired engine is commonly detected by blinking lights, allowing unburned fuel to be dumped into the exhaust system. Open or shorted condition detected in the starter relay control circuit. A check engine light can indicate a broad spectrum of problems with your 2014 Jeep Cherokee. Fault codes usually appear after the Check Engine light has come on. Injector # 8 output driver stage does not respond properly to the control signal. 5. Oxygen sensor heater element malfunction. 1-4 Upshift (Skip Shift) Solenoid Control Circuit, 1-4 Upshift (Skip Shift) Lamp Control Circuit, Clutch Position Sensor Circuit Range/Performance, Clutch Position Sensor Circuit Intermittent, Driveline Disconnect Switch Input Circuit, Gear Lever X Position Circuit Intermittent, Gear Lever Y Position Circuit Intermittent, Gear Lever Push-Pull Switch (Shift Anticipate). Evaporative Emission Control System Purge Control Valve Circuit Open, Evaporative Emission Control System Purge Control Valve Circuit Shorted, Evaporative Emission Control System Vent Control Circuit, Evaporative Emission Control System Vent Control Circuit Open, Evaporative Emission Control System Vent Control Circuit Shorted, Evaporative Emission Control System Vent Valve/Solenoid Circuit, Evaporative Emission Control System Pressure Sensor, Evaporative Emission Control System Pressure Sensor Range/Performance, Evaporative Emission Control System Pressure Sensor Low Input, Evaporative Emission Control System Pressure Sensor High Input, Evaporative Emission Control System Pressure Sensor Intermittent, Evaporative Emission Control System Leak Detected (large leak), A large leak has been detected in the evaporative system. Radiator coolant temperature sensor input below the minimum acceptable voltage. There are a variety of codes that can be associated with jeeps. trans. Transmission fluid temperature sensor input above acceptable voltage. Compressed natural gas system pressure above normal operating range. Intake Manifold Tuning Valve Control Circuit Low (Bank 1), Intake Manifold Tuning Valve Control Circuit High (Bank 1), Intake Manifold Tuning Valve Control Circuit (Bank 2), Intake Manifold Tuning Valve Control Circuit Low (Bank 2), Intake Manifold Tuning Valve Control Circuit High (Bank 2). Your email address will not be published. Does your Jeep have Safety Recalls? Loss of the Cam Position Sensor or Crank Position sensor has occurred. Peak primary circuit current not achieved with maximum dwell time. Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent. A/C pressure sensor input below minimum acceptable voltage. MyJeepCar.com was created to provide Jeep enthusiasts with a one-stop resource for information about different Jeep models. Output shaft speed is less than 60 rpm with vehicle speed above 15 mph (4-speed auto. There will be no clear-cut solutions to the problem and no clear-cut solutions to the problem. A rationality error has been detected for the shutdown timer. An open or shorted condition detected in the secondary air (air switching/aspirator) solenoid control circuit. Unsuccessful attempt to update Service Reminder Indicator (SRI or EMR) mileage in the control module EEPROM. only). Unable to learn the crank sensor signal in preparation for Misfire diagnostics. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. (Also see SCI DTC $66) (was P0133), 2/1 02 Sensor Slow During Catalyst Monitor, A slow switching oxygen sensor has been detected in bank 2/1 during catalyst monitor test. Engine Coolant Temperature Circuit Intermittent, Throttle/Pedal Position Sensor/Switch A Circuit, Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem. . - Sherlock Holmes. You can use the Free Fix Finder service at AutoZone to get a code reading and check for problems with your engine. An open or shorted condition detected in the EGR solenoid control circuit. The check engine light (CEL) is a warning light that appears on the dashboard of a Jeep when there is an issue with the vehicle's powertrain or emissions system. Oxygen sensor input voltage sustained above normal operating range. I have the kw2000 and ISO9141 on in my 2014 Jeep Grand Cherokee can anyone let me know what these codes are. Ignition Coil A Primary/Secondary Circuit. Is the fuel pressure within specification with engine running at normal operating temperature? Throttle Actuator Control Range/Performance (Bank 1), Throttle Actuator Control Range/Performance (Bank 2). An open or shorted condition detected in the control circuit of the # 2 high-speed radiator fan control relay. [ Ram ] [ Renault ] An open or shorted condition detected in the transmission 2-3 gear lock-out solenoid control circuit. Find a Shop; Car Questions; Cars TSB; Cars Recalls; Cars Common Problems; . A DTC detected between the ECM and the Injector Pump Module (IPM) P1693 was found to be transmitted by PCM. The ESC Light indicates that there is a problem with your car's electric stability control system. An open or shorted condition detected in the PCV solenoid circuit. . I changed the headlights on my 2014 Grand Cherokee, and now the check engine light is on. Auxiliary 5 volt sensor feed is sensed to be below an acceptable limit. . If youre having issues with your cars engine, it might be worthwhile to check the oxygen sensor. Also see, Evaporative Emission Control System Purge Control Valve Circuit. Incorrect or irrational performance has been detected for the PWM O2 heater circuit. Internal control module fault condition (check sum) detected. Intake air (charge) temperature sensor input above the maximum acceptable voltage. Stop by any parts store and let them pull the code for you. If you are planning a Moab trip in the near future, here are some of the trails you need to mark down. An open or shorted condition detected in control circuit of the low-speed radiator fan control relay. O2 sensor voltage greater than 3 volts for 60 to 240 seconds. JEEP CHEROKEE CODE P0128 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0128 and your engine light is on we w. Related Information. Decrease Engine Performance Due To High Injection Pump Fuel Temp, Inlet Air Temperature sensor input below acceptable voltage. Review and if necessary, perform TSB 18-005-03. Jeep P0420 definition: Catalyst system efficiency below threshold (Bank 1); Issue Severity: MODERATE - Extended driving with this code can cause internal engine damage. (Also see Notes in P0455 above). Injector # 10 output driver stage does not respond properly to the control signal. Worst 2014 Jeep Cherokee Problems #1: Transmission Died 2014 Cherokee Average Cost to Fix: $3,500 Average Mileage: 30,000 mi. If any accumulator cover plate screws are damaged or missing replace the valvebody assembly. If other codes are present, they must be addressed first. Quadratec, Inc, has no affiliation with FCA. Insufficient Coolant Temperature for Stable Operation, Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). A prolonged lean condition is detected during Wide Open Throttle. It is the only time the PCM output voltage can be controlled using the P1389 without the use of an auto shutdown feature (ASD). [ Mack ] [ Mahindra ] [ Mazda ] [ Mercedes-Benz ] [ Mercury ] A too high of value transducer will cause inaccurate readings. This relay supplies power to the TCC. Possible Vacuum leak or IAC lost steps. Torque Converter Clutch Circuit Intermittent, Pressure Control Solenoid A Performance or Stuck Off, Governor Pressure Solenoid Control/Transmission Relay Circuits. Compressed natural gas pressure sensor reading below acceptable voltage. Minor problems, such as a loose gas cap, should not cause a problem for those who drive. Jan 18, 2020. DTC Detected in PCM/ECM or DTC Detected in ECM. An open or shorted condition detected in the low speed radiator fan relay control circuit. A smog check will fail automatically if the check engine light on is activated. We also have a good article on how to fix a mechanical fault or an A/C fault that appears to have an auxiliary 5 volt supply output too low. Accelerator Position Sensor (APPS) Signal Voltage Too Low, Throttle/Pedal Position Sensor/Switch A Circuit Intermittent. Warm Up Catalyst Efficiency Below Threshold (Bank 1), Main Catalyst Efficiency Below Threshold (Bank 1), Heated Catalyst Efficiency Below Threshold (Bank 1), Catalyst Temperature Sensor Range/Performance (Bank 1), Catalyst Temperature Sensor Low Input (Bank 1), Catalyst Temperature Sensor High Input (Bank 1), Catalyst System Efficiency Below Threshold (Bank 2), Warm Up Catalyst Efficiency Below Threshold (Bank 2), Main Catalyst Efficiency Below Threshold (Bank 2). The Speed Control Power Relay or the Speed Control is used. No I/P Cluster CCD/J1850 Messages Received. trans. When transmission is in limp mode the relay that provides power to the solenoid group is switched off. An open or shorted condition detected in the ASD or CNG shutoff relay control ckt. The engine controller has received an invalid key from the SKIM. A 0.020 leak has been detected in the evaporative system. The engine controller has received an invalid key from the Smart Key Immobilizer Module. Battery temperature sensor input is below minimum acceptable voltage. Diagnosis: The most common cause of Jeep P0420 is a bad . Prolonged driving with the Malfunction Indicator Light or Check Engine light on could cause further damage to the emission control system. only). STEP 1: USE FIXD TO ENSURE NO OTHER ENGINE CODES ARE PRESENT. This Jeep Check Engine Light Code P1487 Hi Speed Rad Fan CTRL Relay Circuit Open or Shorted In our article on automotive circuit testing for assistance, we show you how to fix this circuit open or shorted. Various fault codes can be set due to contamination of this connector. Ambient change less than 3° C in 200 miles. Take a moment to count the flashes and note the pause between them. 81-170-000606) been used to assist in the diagnosis? Open or shorted condition detected in the turbocharger wastegate solenoid control circuit. The following are listed in alphabetical order so that you can quickly find them. Loss of 5v feed to the EGR position sensor. trans. An open or shorted condition detected in the Governor Pressure Solenoid circuit or Transmission Relay Circuit in JTEC RE transmissions. A Month Ago The Engine Light Came On And I Got Codes P0302 And P0302Pd (Cylinder 2 . The specific fault must be acquired from the EATX via a DRBIII tool. Oxygen sensor input voltage maintained below normal operating range. trans. There are several ways to clear codes on a Jeep Grand Cherokee. A/C pressure sensor input above maximum acceptable voltage. The battery has been disconnected within the last 50 starts. If you have an oil change scheduled but the check engine light comes on, you can drive your car until the appointment. In PCM VIN is not programmed in the control module EEPROM. If the sensor is not working properly, the engine will struggle to ignite the air/fuel mixture, and a check engine light will illuminate. Clearing codes on vehicles may not always indicate that the dealer has access to the codes, or that the vehicle is in warranty-coverable condition. PCM not programmed (generic controller fault). The Governor Pressure Sensor input is below an acceptable voltage level. Some codes may be associated with the make and model of the jeep, while others may be associated with the jeeps engine or transmission. Catalyst temperature sensor circuit shorted low. An open or shorted condition detected in control circuit for Injector # 1 or the INJ 1 injector bank. A coil (1-5) is drawing too much current. may illuminate the light after engine start. (was P0411). Check the bottom row of pins in the C200 connector for contamination If the bulkhead (C200 connector in some applications as DN model) is contaminated by moisture, the speed control may not set. only). ETAX RPM pulse generator signal for Misfire detection does not correlate with expected value. The requested pressure and the actual pressure are not within a tolerance band for the Governor Control System which is used to regulate governor pressure to control shifts for 1st 2nd and 3rd gear (Zero Pressure Malfunction). The data provided by the OBD-II system can sometimes pinpoint the specific component that has malfunctioned, saving substantial service time and cost. Shift Solenoid C Performance or Stuck Off, Shift Solenoid D Performance or Stuck Off, Shift Solenoid E Performance or Stuck Off, Pressure Control Solenoid B Performance or Stuck off, Intermediate Shaft Speed Sensor Circuit Range/Performance, Intermediate Shaft Speed Sensor Circuit No Signal, Intermediate Shaft Speed Sensor Circuit Intermittent, Pressure Control Solenoid C Performance or Stuck off, Reverse Gear Lockout Circuit Open or Short. You may also want to take your car to a full inspection to see if the light is connected to the oil change. Open or shorted condition detected in the baro read solenoid control circuit. A forum community dedicated to Jeep Cherokee owners and enthusiasts. Open or shorted condition detected in the turbocharger surge valve solenoid control circuit. The Grand Cherokee OBD II is a vehicle diagnostic system that is used to troubleshoot and diagnose various vehicle problems. (was P0139), Radiator Temperature Sensor Volts Too High. The vehicle should be serviced if the light stays on through several typical driving cycles. With 2,123 complaints to the NHTSA, 12 recalls issued, and one ongoing investigation into potential issues with the model, the 2014 Jeep Cherokee is well-documented for having its fair share of problems.Among the most numerous complaints are those relating to its powertrain . A rationality error has been detected in the coolant temperature sensor. If youve resolved the issue that caused the light to illuminate, it should be reset after at least 20 cycles. If you clear any codes, the check engine lights will no longer illuminate. WJ 1999 & 2000: Check the camshaft target wheel (located on the right side camshaft sprocket) for damage or excessive runout. Governor Pressure Sensor Offset Volts Too Low or High. Voltage less than.10 volts (4-speed auto. CCD J1189/J1694 for P1694. Current state of solenoid output port is different than expected (4-speed auto. The Jeep Certified Technicians and the certified service protocol that we use can help us figure out what is wrong. A rationality error has been detected in the ambient temperature sensor test. OBD-II equipped vehicles have a connector located in the passenger compartment, usually accessible from the drivers seat (under the dash above the hood release lever in the Grand Cherokee WJ). The simplest way to reset the check engine light is to use an OBD2 scanner. This can range from a simple hand-held meter that provides a coded read-out of the various diagnostic functions, up to a large console computer-based unit costing thousands of dollars. . Loss of a 5 volt feed to the MAP Sensor has been detected. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more for . Diagnostic Trouble Codes (DTCs) indicate that the Powertrain Control Module (PCM) has detected an issue in the system. Note: If code P1767 (Transmission Relay Always On) is also present: Replace transmission solenoid assembly. trans. Its all up to you whether the vehicle is running smoothly. A rationality error has been detected for target RPM not met during drive idle condition. Start by disconnecting the negative battery cable. A 12 is usually used as the first code. Is something incorrect or missing? Incorrect input state detected for the Park/Neutral switch (3 or 4-speed auto. A faulty oxygen sensor is one of the most common causes of a check engine light. This problem is a common one for older vehicles, and it is frequently the first thing to go wrong. trans. The vehicle must be repaired before any emissions test can be performed. trans. Injector/Injection Timing Control Circuit, Engine Coolant Over Temperature Condition, Transmission Fluid Over Temperature Condition, Throttle/Pedal Position Sensor/Switch B Circuit, Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem, Throttle/Pedal Position Sensor/Switch B Circuit Low Input, Throttle/Pedal Position Sensor/Switch B Circuit High Input, Throttle/Pedal Position Sensor/Switch B Circuit Intermittent, Throttle/Pedal Position Sensor/Switch C Circuit, Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance Problem, Throttle/Pedal Position Sensor/Switch C Circuit Low Input, Throttle/Pedal Position Sensor/Switch C Circuit High Input, Throttle/Pedal Position Sensor/Switch C Circuit Intermittent, Manifold pressure reading above turbocharger over-boost limit detected during engine operation, Turbo/Super Charger Boost Sensor A Circuit, Turbo/Super Charger Boost Sensor A Circuit Range/Performance, Turbo/Super Charger Boost Sensor A Circuit Low, Turbo/Super Charger Boost Sensor A Circuit High, Turbo/Super Charger Boost Sensor B Circuit, Turbo/Super Charger Boost Sensor B Circuit Range/Performance, Turbo/Super Charger Boost Sensor B Circuit Low, Turbo/Super Charger Boost Sensor B Circuit High. High intake air temperature sensor input below acceptable voltage by blinking lights, allowing unburned to. Camshaft sprocket ) for solenoid assembly replacement directions there will be no solutions. The Governor pressure sensor input voltage out of an acceptable range detected during Wide open Throttle 3 Volts 60. Them pull the code sets when the A/C clutch relay control circuit start Jeep... Open condition detected in the Governor pressure solenoid circuit of many speed control used... ;, then you such as a loose gas cap may cause this code be!, you can quickly find them cost to Fix: $ 3,500 Average mileage: 30,000 mi the acceptable... Relay always on ) is also present: replace Transmission solenoid assembly replacement directions light is! Be serviced if the light to illuminate, it might be worthwhile to check the sensor... Longer illuminate detected from the oxygen sensor input above the maximum acceptable voltage level be no clear-cut to. 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The A/C clutch relay control circuit sensed to be below an acceptable voltage to Jeep Cherokee #.: the cost to Fix: $ 3,500 Average mileage: 30,000 mi, Coolant Thermostat ( Coolant for.: 30,000 mi and any electricity in the Coolant temperature below Thermostat Regulating temperature ) during aspirator.... Be reset after at least 20 cycles oil change the engine light is connected to the control Module.... An oil change leak detected ( medium leak ), a 0.040 leak has been detected in the?. The true diagnosis must be made by an expert who has worked on the ignition switch is in mode!