1005. 1300-1399 P2311 P2302 P1680 Turbo/Super Charger Boost Sensor B Circuit Low NVLD Canister Vent Valve Solenoid Circuit Low     An open or shorted condition detected in the transmission reverse gear lock-out solenoid control circuit. Water in Fuel Light—Water In Fuel Sensor Voltage Too Low, Fuel Composition Sensor Circuit High Input. Injection Pump Fuel Metering Control B (Cam/Rotor/Injector) Low Output SPD Sensor RPM Above 15 MPH Shorted high condition detected in the oxygen sensor 1/1 heater element control feedback sense circuit P0108 (M) Once connector is cleaned from antifreeze contamination, review water pump for potential leak and repair as necessary. P0702 Intake Air Temperature Circuit High Input 3rd Digit P0367 An open or shorted condition detected in the Wait to Start Lamp circuit. Throttle/Pedal Position Sensor/Switch A Circuit Low Input Idle Air Control Valve Solenoid Circuit No communication detected between co-processors in the control module. Transmission Range Sensor Circuit Low Input trans.   May be caused by after market remote starter. Injector Circuit   Evaporative Emission Control System Pressure Sensor Low Input Cylinder 2 Contribution/Balance     Shift/Timing Solenoid     NVLD Canister Vent Valve Solenoid Circuit High. Review and if necessary, perform TSB 18-005-03 The latest ones EVAP Purge Flow Sensor Circuit Intermittent Injector # 9 output driver stage does not respond properly to the control signal. DRB Scan Tool Display Low Speed Fan CTRL Relay Circuit Open or shorted condition detected in the turbocharger surge valve solenoid control circuit DRB Scan Tool Display P0565 P1284 (M) Throttle/Pedal Position Sensor/Switch C Circuit Intermittent Cylinder 5 Contribution/Balance 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 fuel pump relay control circuit. Oil Pressure Sensor Low P0792 Idle Speed Performance P0311 (M)   This area is the source of many speed control complaints. P2320   DTCs are automatically erased following 40 warm-up cycles if the component does not fail again. Ignition Coil Secondary # 8 Circuit Fuel Rail Pressure Sensor Circuit Range/Performance P0607 Warm Up Catalyst Efficiency Below Threshold (Bank 1) Pressure Control Solenoid C P1284 (M) Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor) P1684   P0414 P0503 P0152 (M)   Insufficient flow of secondary air injection detected during aspirator test. Description of Diagnostic Trouble Code P0293 Generator Lamp Control Circuit   Transmission Range Sensor Circuit Malfunction (PRNDL Input) P1388 P0370 P0122 (M) Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection. P0761     P0394 Shorted condition detected in the oxygen sensor heater element control feedback sense circuit. Peak primary circuit current not achieved with maximum dwell time (high impedance). P0711 (M) An open condition detected In the ASD relay output circuit. Speed control switch input above maximum acceptable voltage. Oxygen sensor heater element malfunction. This includes all counter information for warm-up cycles, trips and Freeze Frame. P1485 P0443 (M) Aux 5 Volt Supply Voltage High Oxygen sensor heater element malfunction. EVAP Purge Flow Sensor Circuit High Input   Once a Jeep Grand Cherokee's check engine light illuminates, it means the On-Board Diagnostic system has repeatedly detected an engine malfunction. This is normal and is designed to provide operation in one gear only. Transmission Range Display Circuit DRB Scan Tool Display P0834 Stays on. Has the Leak Detection Pump Operation and Diagnosis booklet (Publication No. Erasing the DTC with the DRB III erases all OBD II information. Shift Solenoid B Stuck On P0761 No CCD/J1850 messages received from the Smart Key Immobilizer Module (SKIM). 0800-0899   An open or shorted condition detected in the transmission fan relay circuit. Input/Turbine Speed Sensor Circuit P1391 (M) Intake Manifold Tuning Valve Control Circuit Low (Bank 2) Wait To Start Lamp Circuit General temperature sensor rationality error.   Ignition Coil F Primary/Secondary Circuit 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 (Mid Pressure Malfunction). Intake Manifold Tuning Valve Control Circuit (Bank 1)   Air Conditioner Refrigerant Charge Loss P0168 P0606 (M) O2 Sensor Heater Circuit (Bank 2 Sensor 2) (Input or Output Speed Sensor failures often cause this code and are a common failure part on WJ Grand Cherokees).   Catalyst Temperature Sensor Circuit Shorted Low   High Speed Radiator Fan Ground CTRL Relay Circuit.   P0524 A rationality error has been detected in the coolant temperature sensor. OBD Scan Tools - Automotive Diagnostics. Examples of some external system leaks are: a loose gas cap, a disconnected evaporative system hose, or a loose hose connection.   Cylinder 9 Contribution/Balance P0566   P0357 (M) Oxygen sensor response slower than minimum required switching frequency. P0247 Unsuccessful attempt to write to an EEPROM location by the control module. (Also see SCI DTC $66) (was P0133) Air Assisted Injector Control Circuit High P0501 Mass or Volume Air Flow Circuit A/C Clutch Relay Control Circuit High trans.   NVLD pressure switch stuck closed. P0166   P0660 OS Sensor Circuit Slow Response (Bank 1 Sensor 2) In PCM Odometer is not programmed in the control module EEPROM.     Problem detected in air conditioning electrical circuit. O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3) 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. Knock Control System Error   P0106 (M) P0427 If after performing all powertrain test for P0441 with results that appear to be normal/test pass, check for fuel in the purge canister. Insufficient Coolant Temperature for Stable Operation     A rationality error has been detected for the thermostat. Turbo/Super Charger Boost Sensor B Circuit 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). P1484 NVLD Canister Vent Valve Solenoid Circuit Low P0035 An open or shorted condition detected in speed control vent solenoid control circuit. module from transfer case module during 4WD low gear engagements) Evaporative Emission Control System Purge Control Valve Circuit Injector # 2 Control Circuit O2 Sensor Circuit Slow Response (Bank 1 Sensor 3) O2 Sensor Circuit Slow Response (Bank 2 Sensor 1) If no codes are present then "Done" will appear. Ambient temperature sensor input below the minimum acceptable voltage. Rationality error detected for clutch upstop switch performance.   Engine does not reach operating temperature. P0483 Loss of water-in-fuel circuit or sensor. Shift Solenoid D Shift Solenoid C Electrical Battery temperature sensor input voltage below an acceptable range. P0436   This code indicates that the EATX (Transmission controller) has an active fault and has illuminated the MIL via a BUS message. Also, possible faulty or loose gas cap. Turn the ignition key until the digital odometer displays, repeat three times in succession and then back to "On" (On/Off, On/Off, On/Off, On). P0162 (M) This code can be set as the remote starter is activated and the pcm receives ignition run voltage and the tcm does not.   Scan Code 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 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. Fuel Delivery Error EGR position sensor signal does not correlate to EGR duty cycle.   Description of Diagnostic Trouble Code   Description of Diagnostic Trouble Code An open or shorted condition detected in control circuit for Injector # 3 or the INJ 3 injector bank. Internal Fuel Injection Pump Controller Failure   No Temp Rise Seen From Intake Heaters   Injector # 5 output driver stage does not respond properly to the control signal. Engine Coolant Temperature Circuit Intermittent Throttle/Pedal Position Sensor/Switch A Circuit Low Input.   At the fourth "On" the odometer will be replaced with codes.   MAP sensor input voltage out of an acceptable range detected during reading of barometric pressure at key-on. P0812 P1602 (M) When transmission is in limp mode the relay that provides power to the solenoid group is switched off. Engine Coolant Temperature Circuit P0439 Cylinder 2 Injector Circuit Low P0350 P0805 No BUS CCD Messages Received from ECM O2 Sensor Circuit Malfunction (Bank 2 Sensor2) A rationality error has been detected in the coolant temperature sensor. The engine controller has received an invalid key from the SKIM. P0839 A shorted low condition detected in NVLD solenoid circuit. P0753 (M) Knock Sensor 1 Circuit (Bank 1 or Single Sensor) of interest at the merchant website before making a purchase.   2/1 02 Sensor Slow During Catalyst Monitor P0743 (M)     P0766 P1688 (M) Sensor Circuit Malfunction (Bank 1 Sensor 3) Internal Fuel Injection Pump Controller Failure   Fuel Trim (Bank 1) P0837   Was MIL code 37. Cruise Control Multi-Function Input Signal, Cruise Control/Brake Switch A Circuit Low, Cruise Control/Brake Switch A Circuit High, Cruise Control System - Vehicle Speed Too High. Injector # 5 Control Circuit Cylinder 4 Injector Circuit High Exhaust Gas Recirculation Sensor B Circuit The vehicle should be serviced if the light stays on through several typical driving cycles. P0276 P0016   Oxygen sensor heater element malfunction.   O2 Sensor Circuit Slow Response (Bank 2 Sensor 2)   Cylinder # 5 Misfire P0358 (M) An open or shorted condition detected in the radiator fan control relay control circuit. Throttle/Pedal Position Sensor/Switch A Circuit Intermittent P0498 Shift/Timing Solenoid Intermittent P0400 Engineering department suggests to replace transmission solenoid assembly anytime these two trouble codes occur together. P0143 Injector # 7 Control Circuit P0465 Engine coolant temperature sensor input above the maximum acceptable voltage. CNG Pressure Sensor Voltage Too Low P0757 Intake Manifold Tuning Valve Control Circuit (Bank 1) P0209 (M) System too Lean (Bank 2) P0042 P1193 (M)   P0377 A/C pressure sensor input below minimum acceptable voltage. Is the fuel pressure within specification with engine running at normal operating temperature? See note provided. Timing Reference High Resolution Signal B No Pulses Reverse Gear Lockout Circuit Open or Short P1486 (M) Sensor input greater or less than calibration for 3 consecutive Neutral/Park occurrences (4-speed auto.   Catalytic Converter Overheat Detected P0488 P0344 Engine Oil Over Temperature Ignition Coil C Primary/Secondary Circuit P0086 Four wheel drive (4WD) muxed switch input detected below minimum or above maximum acceptable voltage (switch status provided to engine OBD-II Trouble Codes repair site APPS voltage input below the minimum acceptable voltage.     O2 Sensor Heater Circuit (Bank 1 Sensor 2) P0152 (M) P0131 (M) P0582 engine code for 2012 Jeep Grand Cherokee provides below are generic codes that may not apply to all vehicles. starts (status indicator only - NOT a reported fault code) P0170 P0765 Bus communication failure to PCM. P1598 Be sure to completely read the TSB. O2 Sensor Circuit High Voltage (Bank 1 Sensor 1) Power Steering Pressure Sensor Circuit High Input   APPS voltage input above the maximum acceptable voltage. Transmission Control System Electrical P0189 Fuel Injection Pump Controller Always On   Catalyst Temperature Sensor Range/Performance (Bank 2)   trans. The Governor Pressure Sensor input is below an acceptable voltage level. Is the fuel pressure within specification with engine running at normal operating temperature? ASD Relay Control Circuit P0847 Shift Solenoid A Stuck On See TSB 07-005-02   Crankshaft Position Sensor B Circuit Range/Performance Scan Code An open or shorted condition detected in the manifold tuning valve solenoid control circuit. Transmission Fluid Pressure Sensor/Switch A Circuit Low P0801 Engine coolant temperature sensor input above the maximum acceptable voltage. P1293 P0419 Speed Control Switch # 1 Performance Throttle/Pedal Position Sensor/Switch C Circuit Low Input EGR System Failure Time to enter Closed Loop Operation (Fuel Control) is excessive. Unable to learn the crank sensor signal in preparation for Misfire diagnostics.   0400-0499 P0198 A rich air/fuel mixture has been indicated by an abnormally lean correction factor. O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1) P0850   P1599 Cruise Control/Brake Switch A Circuit High P0036   O2 Sensor Heater Circuit (Bank 1 Sensor 1) P1484 The data provided by the OBD-II system can sometimes pinpoint the specific component that has malfunctioned, saving substantial service time and cost. Turbo/Super Charger Wastegate Solenoid A Ignition Coil Secondary # 5 Circuit PCM not programmed (generic controller fault).     Injector # 4 or INJ 4 injector bank output driver stage does not respond properly to the control signal. Cylinder 12 Contribution/Balance Home   for shopping Throttle Actuator Control Range/Performance (Bank 1)   Turn the ignition key until the digital odometer displays, repeat three times in succession and then back to "On" (On/Off, On/Off, On/Off, On). Misfire detected in Cylinder # 5. Exhaust Valve Control Solenoid Circuit High (Bank 2) Is the fuel pressure within specification with engine running at normal operating temperature?   Cruise Control Multi-Function Input Signal P0243   Check for a shorted clock spring causing the speed control 5 volt feed to be shorted to power. Fuel level sending unit voltage does not change for more than 40 miles. voltage.   Injector # 7 output driver stage does not respond properly to the control signal. Fuel level sensor input below acceptable voltage. O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)   P1482 A rationality error has been detected for target RPM not met during drive idle condition. P0510 1004.   Speed Control Switch # 1 High A rationality error has been detected for the intake air temperature sensor. P1283 An open or shorted condition detected in the PCV solenoid circuit.     P0784   P0843   An open or shorted condition detected in the Leak Detection Pump (LDP) solenoid circuit. If ORVO is working as designed insure that the vehicle owner is not overfilling the fuel tank. Fuel Level Output Circuit No MIC BUS Message Relationship between Cam and Crank signals not correct. Fuel Level Unit No Change Over Miles   02 Sensor Heater Control Circuit Low (Bank 1 Sensor 3) Transmission 12 Volt Supply Relay CTRL Circuit. Torque Converter/Brake Switch B Circuit High   P0815 P0076 P0737 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1) P1598 P0070 Target Idle Not Reached Consult the flash codes online. Evaporative Emission Control System Leak Detected (very small leak). P0501 P0163 (M)   P0447 Note: If code P1767 (Transmission Relay Always On) is also present: Replace transmission solenoid assembly. Problem detected in air conditioning electrical circuit. Pressure Control Solenoid A Performance or Stuck Off DRB Scan Tool Display P1389 (M) Injector # 8 Control Circuit P0710 No calibration voltage present from flex fuel sensor. P0797 A/C pressure sensor input below the minimum acceptable voltage. P0790 trans. No CCD/J1850 Message From TCM APPS voltage input below the minimum acceptable voltage. P0350 O2 Sensor Circuit (Bank 1 Sensor 1) This may occur after driving the vehicle in rain or by washing the vehicle. Oxygen sensor response slower than minimum required switching frequency. Cylinder 10 Contribution/Balance P1291 (M)   P0155 (M)   P0138 (M) Foreign vehicles may also use DTC codes different from the generic DTC codes. EGR Solenoid Circuit Engine RPM Output Circuit This internal leak may be caused by an intermittent or permanently stuck open Duty Cycle Purge (DCP) valve. Misfire detected in Cylinder # 3. trans. 02 Sensor Heater Control Circuit Low (Bank 2 Sensor 2) P1487 money.   A/C Sensor Input Lo P0724 SPD CTRL PWR Relay; or S/C 12v Driver Circuit. Prior to replacing parts, check all connectors between the speed control switch and the PCM for moisture Internally the PCM uses the same A/D (analog to digital) converter for TPS voltage as it does for the speed control switch sense. Internal control module fault condition (check sum) detected. P1294 (M) Intake Manifold Tuning Valve Control Circuit High (Bank 1) Control Module VSS Output A OBD is an electronic system designed to control engine functions and diagnose engine problems or component failures, as well as minimize emissions. An internal leak may cause one of the above DTC?s. 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