Short Runner Valve Solenoid Circuit P0837 P1757 P1198 Secondary Air Injection System Switching Valve A Circuit Shorted SPD CTRL PWR Relay; or S/C 12v Driver Circuit   Ignition Coil Secondary # 3 Circuit Injector # 9 Control Circuit MAP sensor input above maximum acceptable voltage. Leak Detection Pump Solenoid Circuit trans. Exhaust Pressure Control Valve Low Be sure that there is not any leaks in the system. O2 Sensor Circuit High Voltage (Bank 2 Sensor3) Secondary Air Injection System (Bank 1) P0145   only). P0109 P0342 (M)   P0660 Peak primary circuit current not achieved with maximum dwell time (high impedance). Malfunction Indicator Lamp (MIL) Control Circuit Sensor input greater or less than calibration for 3 consecutive Neutral/Park occurrences (4-speed auto. An internal leak may cause one of the above DTC?s. Radiator coolant temperature sensor input below the minimum acceptable voltage. P0382 (M) A rich air/fuel mixture has been indicated by an abnormally lean correction factor. Low Output SPD Sensor RPM Above 15 MPH 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. Fuel Injection Pump Controller Always On Cylinder 1 Injector Circuit Low   Retrieving codes: P0664 P0209 (M)   Control Module Vehicle Options Error An open or shorted condition detected in the fuel pump relay control circuit. P0250 Evaporative Emission Control System Vent Control Circuit Shorted Fuel Level Unit No Change Over Miles Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem     wiTech … Fuel Composition Sensor Circuit Low Input 1500-1599 LDP has detected a pinched hose in the evaporative hose system. P0133 (M) Loss of the Cam Position Sensor or Crank Position sensor has occurred. Leak Detection Pump Sw or Mechanical Fault Gear Lever Y Position Circuit Intermittent P1192 (M) Injector # 10 output driver stage does not respond properly to the control signal. Torque Con Clu No RPM Drop at Lockup   No vehicle speed sensor signal detected during road load conditions.   An open or shorted condition detected in the PCV solenoid circuit. So please read our Disclaimer and when you're ready jump in! P1490 (M) Ambient/Battery Temperature Sensor Volts Too High Camshaft Position Sensor B Circuit Low Input (Bank 2) No CCD/J1850 messages received from the body control module. O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) Secondary Air Injection System Switching Valve B Circuit Open Engine does not reach operating temperature. P0718 An open or shorted condition detected in the high speed radiator fan relay control circuit.   P0512 Evaporative Emission Control System Incorrect Purge Flow Oxygen sensor response slower than minimum required switching frequency. Neither rich or lean condition is detected from the oxygen sensor. Fuel Temperature Sensor A Circuit Range/Performance P0461 P0240 This TSB applies in a very limited number of cases and usually in mountainous regions.   Engine Coolant Over Temperature Condition Evaporative Emission Control System Pressure Sensor High Input Control Module VSS Output A   PWM O2 Heater Performance O2 Sensor Heater Circuit (Bank 1 Sensor 3) P2503 A/C Pressure Sensor Volts Too High Timing Reference High Resolution Signal A Too Few Pulses P1695 Evaporative Emission Control System Vent Valve/Solenoid Circuit Exhaust Gas Temperature Sensor Circuit Low (Bank 1) P1389 (M) Description of Diagnostic Trouble Code This may occur after driving the vehicle in rain or by washing the vehicle.   P0085 A trip is defined as 'start the vehicle and operate it to meet the criteria necessary to run the given monitor.'   P0850 DRB Scan Tool Display Possible Vacuum leak or IAC lost steps. Starter Request Circuit (Input or Output Speed Sensor failures often cause this code and are a common failure part on WJ Grand Cherokees). only).   Intermediate Shaft Speed Sensor Circuit Range/Performance P0255 MAP sensor input above maximum acceptable voltage. Cylinder 4 Injector Circuit High   A too high of value transducer will cause inaccurate readings.     P0711 (M)   P0408 8 = ?   voltage. Cylinder # 1 Misfire   Open circuit between PCM and fuel gauge sending unit.   P0606 (M) Internal Control Module Keep Alive Memory (KAM) Error.   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). P0165 Fault In Companion Module     Battery voltage sensor input below the minimum acceptable voltage. O2 Sensor Circuit Slow Response (Bank 2 Sensor 1), O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1), O2 Sensor Heater Circuit (Bank 2 Sensor 1), O2 Sensor Circuit Malfunction (Bank 2 Sensor2), O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2), O2 Sensor Circuit High Voltage (Bank 2 Sensor 2), O2 Sensor Circuit Slow Response (Bank 2 Sensor 2), O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2), O2 Sensor Heater Circuit (Bank 2 Sensor 2), O2 Sensor Circuit Malfunction (Bank 2 Sensor 3), O2 Sensor Circuit Low Voltage (Bank 2 Sensor 3), O2 Sensor Circuit High Voltage (Bank 2 Sensor3), O2 Sensor Circuit Slow Response (Bank 2 Sensor 3), O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 3), OS Sensor Heater Circuit (Bank 2 Sensor 3). P0327 P0401 (M) This area is the source of many speed control complaints. An open or shorted condition detected in the ASD or CNG shutoff relay control ckt. sending unit. P0420 (M) APPS voltage input above the maximum acceptable voltage. An open or shorted condition detected in the transmission 2-3 gear lock-out solenoid control circuit. P0077 No CCD/J1850 messages received from the cluster control module. P1486 (M) P1683 P0186 OS Sensor Circuit Slow Response (Bank 1 Sensor 2) Cylinder 2 Injector Circuit High Evaporative Emission Control System Pressure Sensor Low Input Cylinder 3 Injector Circuit High Fuel Injection Pump Controller Always On Time to enter Closed Loop Operation (Fuel Control) is excessive. Intake Manifold Tuning Valve Control Circuit (Bank 1)   Fuel Injection Pump CKP Sensor Does Not Agree with ECM CKP Sensor Camshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor)   P0385 P0120 Camshaft Position Sensor B Circuit (Bank 1) PCM not Programmed P0733 Ignition Coil F Primary/Secondary Circuit P0210 (M)   Vehicle Speed Sensor Intermittent/Erratic/High P0223 (M) Air Assisted Injector Control Circuit High Fuel Level Sending Unit Volts Too Low P0310 (M) P0102 P0348 Throttle/Pedal Position Sensor/Switch B Circuit High Input P0715 Transmission Relay Always On. Neither rich or lean condition is detected from the oxygen sensor input. P0516 Shift Solenoid C Misfire detected in Cylinder # 1. P0608 P0755   Intake Air Temperature Circuit Low Input Refer to our Generic OBD II code list for definitions on all other Jeep diagnostic trouble codes. trans.   P0352 (M) P0487 May be caused by after market remote starter. P0366 An open or shorted condition detected in the ASD or CNG shutoff relay control ckt. DTCs can be erased anytime with a DRB III.   General temperature sensor rationality error.   P0121 (M)   Evaporative Emission Control System Leak Detected (medium leak) Starter Relay Circuit High P0640 P1280   Ignition/Distributor Engine Speed Input Circuit Range/Performance, Ignition/Distributor Engine Speed Input Circuit No Signal, Ignition/Distributor Engine Speed Input Circuit Intermittent, Knock Sensor 1 Circuit (Bank 1 or Single Sensor).   P1595 Cylinder 9 Injector Circuit Low Incorrect input state detected in the brake switch circuit. Misfire detected in Cylinder # 12. Also, possible faulty or loose gas cap. P0308 (M)   An open or shorted condition is detected in the Transmission Relay control circuit. Pressure Control Solenoid C Performance or Stuck off Timing Reference High Resolution Signal B Intermittent/Erratic Pulses JScan allows reading standard Diagnostic Trouble Codes (emission related), general Live Data and much more. 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.   Camshaft Position Sensor A Circuit Range/Performance (Bank 2)   P0656   Circuit shorted to voltage between PCM and fuel gauge P0044     A/C pressure sensor input above the maximum acceptable voltage.   P0036 Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance P0544 Low Speed Fan CTRL Relay Circuit P1180 Exhaust Gas Recirculation Flow Excessive Detected P0714   P0381 (M) P0748 (M) P1290 Clutch Position Sensor Circuit Intermittent Speed control switch input above maximum acceptable voltage. Cylinder 7 Contribution/Balance The runout is very critical for proper camshaft signal input to the JTEC. P1496 (M)     Intermittent Loss of CMP or CKP Catalyst 2/1 efficiency below required level. Corrosion due to system moisture or possible water intrusion into the system. Insufficient Coolant Temperature for Closed Loop Fuel Control DTC Detected in Companion Module   P0157 (M) An open or shorted condition detected in control circuit for Injector # 3 or the INJ 3 injector bank. Main Catalyst Efficiency Below Threshold (Bank 1) Leak Detection Pump Sw or Mechanical Fault Invalid SKIM Key Special thanks to Ed at  PT Do It Yourself.net  for providing additional listings and information for this page. No MIC BUS Message A slow switching oxygen sensor has been detected in bank 1/1 during catalyst monitor test. Description of Diagnostic Trouble Code P0394   Inlet Air Temperature sensor input below acceptable voltage P0231 Pump should be replaced if found leaking. EGR Solenoid Circuit P0461 P0263 Problem detected in air conditioning electrical circuit.     An open or shorted condition detected in the ASD relay control circuit. No CCD/J1850 Message From PCM Auxiliary 5 volt sensor feed is sensed to be below an acceptable limit. In PCM VIN is not programmed in the control module EEPROM. O2 sensor voltage greater than 3 volts for 60 to 240 seconds. O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)   P1740 (M) A rationality error has been detected for intermittent loss of camshaft position sensor. P0700 (M) P0787 81-170-000606) been used to assist in the diagnosis? P0350 Catalyst Temperature Sensor Range/Performance (Bank 1) P0034 trans. (Also see SCI DTC $66) (was P0133) Too Much Secondary Air Battery temperature sensor input voltage above an acceptable range. Timing Reference High Resolution Signal A Intermittent/Erratic Pulses ABS, Steering Column, Automatic Transmission, Radio, … Part 2 of 2: Understanding the Codes 1. (was P0139), Radiator Temperature Sensor Volts Too High. only). Exhaust Pressure Sensor P0199   P0451 Review and if necessary, perform TSB 18-005-03.   (Also see Notes in P0455 above). An open condition detected In the ASD relay output circuit.   Oxygen sensor input voltage maintained below normal operating range. P1496 (M) only). P0163 (M) P0012   P0107 (M) Throttle Actuator Control Range/Performance (Bank 1), Throttle Actuator Control Range/Performance (Bank 2). P0662 Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance P0757 trans. Fuel Trim Malfunction (Bank 2) P1830 P0639 P1491 Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector) P0353 (M)   Torque Converter Clutch Solenoid/Transmission Relay Circuits.     P1493 (M or G) Transmission Range Sensor Circuit High Input O2 Sensor Circuit Slow Response (Bank 1 Sensor 1). After three good trips the MIL is extinguished and the Task Manager automatically switches the trip counter to a warm-up cycle counter. P0732   No communication detected between co-processors in the control module. Stock Transmission Skid Plate; Frame Rail Nutsert   Ignition Coil Secondary # 5 Circuit P1691 Peak primary circuit current not achieved with maximum dwell time (high impedance). These tests are know as 'two trip monitors.' transfer case module during 4WD low gear engagements) No Temp Rise Seen From Intake Heaters Exhaust Gas Recirculation Sensor B Circuit High P1486 (M) Shift Solenoid E Intermittent Intake Air Heater Circuit High Incorrect Gear Ratio Review and if necessary, perform TSB 18-005-03 Remove after market remote starter. P0428 A rationality error has been detected for the shutdown timer. P0223 (M)   An open or shorted condition detected in the control circuit of the # 2 high-speed radiator fan control relay.   O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)   They will provide valuable info! P0624 P0824 Cooling Fan 1 Control Circuit P0245 P0120 P0403 (M) P0422 Corrosion due to system moisture or possible water intrusion into the system. P0158 (M) P0080 P0549 P0418   Scan Code GOV Press Not Equal to Target @ 15-20 PSI P0498     Engine Speed Input Circuit Range/Performance Insufficient flow of secondary air injection detected during aspirator test. 3-4 Shift Sol P1399 P0268   P0726 only).   Engine Speed Input Circuit Intermittent P0799 Misfire detected in multiple Cylinders. Crankshaft/Camshaft Timing Misalignment P0200 See P1596 above. Clutch Pedal Switch A Circuit An open or shorted condition detected in the transmission 2-3 gear lock-out solenoid control circuit. Circuit shorted to voltage between PCM and fuel gauge Turbo/Super Charger Wastegate Solenoid A Range/Performance, Turbo/Super Charger Wastegate Solenoid A Low, Turbo/Super Charger Wastegate Solenoid A High, Turbo/Super Charger Wastegate Solenoid B Range/Performance, Turbo/Super Charger Wastegate Solenoid B Low, Turbo/Super Charger Wastegate Solenoid B High, Injection Pump Fuel Metering Control A (Cam/Rotor/Injector), Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector), Injection Pump Fuel Metering Control A Low (Cam/Rotor/Injector), Injection Pump Fuel Metering Control A High (Cam/Rotor/Injector), Injection Pump Fuel Metering Control A Intermittent (Cam/Rotor/Injector), Injection Pump Fuel Metering Control B (Cam/Rotor/Injector), Injection Pump Fuel Metering Control B Range/Performance (Cam/Rotor/Injector), Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector), Injection Pump Fuel Metering Control B High (Cam/Rotor/Injector), Injection Pump Fuel Metering Control B Intermittent (Cam/Rotor/Injector), Random/Multiple Cylinder Misfire Detected, Single Cylinder Misfire (Cylinder not Specified). Neither rich or lean condition is detected from the oxygen sensor.   P0083 Injection Pump Fuel Metering Control A High (Cam/Rotor/Injector) P0130 P0751 (M) P0285 O2 Sensor Heater Circuit (Bank 1 Sensor 2) A rationality error has been detected for target RPM not met during drive idle condition. Misfire detected in multiple Cylinders.     (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. Speed Control Switch # 1 Low Shift/Timing Solenoid Low Once connector is cleaned from antifreeze contamination, review water pump for potential leak and repair as necessary. Description of Diagnostic Trouble Code P0452   See P1596 above. P0130 Once connector is cleaned from antifreeze contamination, review water pump for potential leak and repair as necessary. P1286 ASD voltage sensed when ASD relay is energized or ASD voltage not sensed when ASD relay is not energized. Fuel Injection Pump Controller Calibration Error Knock sensor (# 1) signal above or below minimum acceptable threshold voltage at particular engine speeds. DRB Scan Tool Display Clutch Pedal Switch B Circuit Low Scan Code P1475 0500-0599     Injector/Injection Timing Control Circuit   P0168 P0058 Gear 3 Incorrect Ratio Home   1700-1799 Ignition Coil J Primary/Secondary Circuit P0465 Camshaft Position Sensor B Circuit Low Input (Bank 1) P1604 No SKIM BUS Messages Received An open or shorted condition detected in the ASD relay control circuit. O2 Sensor Circuit High Voltage (Bank 2 Sensor3) Shorted condition detected in the oxygen sensor heater element control feedback sense circuit. Exhaust Gas Temperature Sensor Circuit High (Bank 1) Cylinder 12 Contribution/Balance   Jeep Grand Cherokee Jeep Grand Cherokee 2nd gen best diagnostic tool/kit (1999 - 2004) Jeep Grand Cherokee 3rd gen best diagnostic tool/kit (2005 - 2010)   Probable defective Crank Sensor. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. No Z1 or Z2 voltage sensed when the auto shutdown relay is energized. Injector # 2 Control Circuit Throttle/Pedal Position Sensor/Switch A Circuit Low Input These codes and video may work with other OBD1 Jeeps.   P0273 P2320 P0622 (G) For PL 2.0L P0849 O2 Sensor Heater Circuit (Bank 1 Sensor 3) P0748 (M) Transmission Range Sensor Circuit Low Input Shift Solenoid C Stuck On Gear Lever Y Position Circuit Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor) Crankshaft Position Sensor B Circuit Reverse Gear Lockout Circuit Open or Short Four wheel drive (4WD) muxed switch input detected in invalid or irrational switch state (switch status provided to engine module from Shift Solenoid C Intermittent ASD Relay Control Circuit   P0610 P1681 P1482 Engine is Cold Too Long Transmission Temperature Sensor Voltage Too High DTC Detected in PCM/ECM or DTC Detected in ECM P0467 P0262 Ignition Coil Secondary # 8 Circuit     P0532 Flex fuel sensor input below minimum acceptable voltage. Circuit shorted to voltage between PCM and fuel gauge Misfire detected in Cylinder # 2. Power Steering Pressure Sensor Circuit Range/Performance Internal Fuel Injection Pump Controller Failure Sensor supply voltage for ECM sensors is too low. Oxygen sensor heater element malfunction. Transmission 12 Volt Supply Relay CTRL Circuit Fuel Composition Sensor Circuit Low Input Engine Coolant Temperature Circuit High Input No vehicle speed sensor signal detected during road load conditions. 02 Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Cylinder # 5 Misfire P0287 P0137 (M) Clutch Pedal Switch A Circuit High An open or shorted condition is detected in the Transmission Relay control circuit. Injector Circuit - Cylinder 12 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.   P0268 Engine Oil Temperature Sensor P0311 (M) pressure solenoid or relay circuits (4-speed auto. Speed Control Switch # 1 High Pressure Control Solenoid A     B0099; B0119; B0120; B0121; B0122; B0127; B012F; B0131; B1001; B100A; B1016; B1031; B1032; B1034; B1035; B1036; B1040; …   Input/Turbine Speed Sensor Circuit Range/Performance P0405 (M) An open or shorted condition detected in either of the speed control vacuum or vent solenoid control circuits.   02 Sensor Heater Control Circuit High (Bank 1 Sensor 2) Governor pressure greater than 3 psi when requested to be 0 psi (4-speed auto. P0780 P0172 (M) P0197 Voltage less than.10 volts (4-speed auto.     P0783 Baro Read Solenoid Circuit P0733 Camshaft Position Sensor B Circuit (Bank 2) O2 Sensor Heater Circuit (Bank 1 Sensor 1) Ignition Coil I Primary/Secondary Circuit Camshaft Position Sensor B Circuit Range/Performance (Bank 2) 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. If ORVO is working as designed insure that the vehicle owner is not overfilling the fuel tank. Secondary Air Injection System Switching Valve B Circuit Open   The vehicle should be serviced if the light stays on through several typical driving cycles. Exhaust Pressure Sensor Intermittent P0789 Immediate service is required. Engine Oil Over Temperature P0160 (M) P0444 Ignition Coil Secondary # 7 Circuit 1100-1199 P0307 (M) B Camshaft Position - Timing Over-Retarded (Bank 1) Ignition/Distributor Engine Speed Input Circuit Range/Performance A/C pressure sensor input below the minimum acceptable voltage. Transmission Temperature Sensor Voltage Too Low P1764 (M) A slow switching oxygen sensor has been detected in bank 2/1 during catalyst monitor test. P0023 An open or shorted condition detected in speed control vent solenoid control circuit. Warm Up Catalyst Efficiency Below Threshold (Bank 1) Oxygen sensor heater element malfunction. P0549 P1694 P0523 P0123 (M) APPS supply voltage input below the minimum acceptable P0139 (M) P0747 If there is water intrusion into the connector, dry the connector and repair area that is allowing water into the connector. Too Little Secondary Air System too Rich (Bank 2) P0159 P0281 MIL LAMP-ON MESSAGE - Each time the cluster receives a MIL lamp-on message from the PCM, the indicator will be illuminated. Turbo/Super Charger Wastegate Solenoid B Range/Performance Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor) Exhaust Gas Temperature Sensor Circuit High (Bank 2)   P0505 (M) An open or shorted condition detected in speed control Vacuum solenoid control circuit.   P0574 trans. P1697 (M) P0778 Transmission Fan Relay Circuit Exhaust Gas Recirculation Throttle Position Control Circuit   Pressure Control Solenoid C Intermittent Cylinder # 2 Misfire P1757 (M) Too Little Secondary Air P0569 P0760 A Diagnostic Trouble Code (DTC) indicates that the Powertrain Control Module (PCM) has recognized an abnormal condition in the system. O2 Sensor Circuit High Voltage (Bank 2 Sensor 2) P0294 Scanning OBD-II signals can also provide important information when purchasing a used vehicle. P0135 (M) 1700-1799   Engine is Cold Too Long P0358 (M)   Camshaft Position Sensor B Circuit (Bank 1) P0343 (M)   P0813   P0239 Injector # 1 Control Circuit Description of Diagnostic Trouble Code Loss of a 5 volt feed to the Throttle Position Sensor has been detected. P0421 A rationality error has been detected for no vehicle speed sensor signal detected during road load conditions. Throttle/Pedal Position Sensor/Switch C Circuit High Input No Climate Bus Messages P0546 trans. (A faulty gas cap may cause this code). 0400-0499 P0482 P0355 (M) Evaporative Emission Control System Vent Control Circuit Open Transmission control module RAM self-test fault detected. Exhaust Pressure Sensor The runout is very critical for proper camshaft signal input to the JTEC. In PCM Odometer is not programmed in the control module EEPROM. Transmission fluid temperature sensor input above acceptable voltage. During low fuel.   1st Digit Excessive flow of secondary air injection detected during aspirator test (was P0411). Loss of 5v feed to the EGR position sensor. Once connector is cleaned from antifreeze contamination, review water pump for potential leak and repair as necessary. An open or shorted condition detected in the control circuit of the # 3 high speed radiator fan control relay. The battery has been disconnected within the last 50 starts. P0122 (M) P0351 (M) Secondary Air Injection System Switching Valve A Circuit Open, Secondary Air Injection System Switching Valve A Circuit Shorted, Secondary Air Injection System Switching Valve B Circuit, Secondary Air Injection System Switching Valve B Circuit Open, Secondary Air Injection System Switching Valve B Circuit Shorted, Secondary Air Injection System Relay A Circuit, Secondary Air Injection System Relay B Circuit, Catalyst System Efficiency Below Threshold (Bank 1). Power Steering Control Circuit We do our best to update these Jeep check engine light codes as frequently as possible. P1391 (M) Fuel Trim Malfunction (Bank 2)     P0750 System too Rich (Bank 2) Crankshaft Position Sensor B Circuit Invalid SKIM Key A fault has been generated in the companion engine control module. P0622 (G) Ignition Coil B Primary/Secondary Circuit Mass or Volume Air Flow Circuit Range/Performance Problem   P0177 may illuminate the light after engine start. Skim Invalid Key An open or shorted condition detected in the air assist solenoid circuit. Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem   A 0.040 leak has been detected in the evaporative system. P0804 P0636 P1195 (M) Relationship between Cam and Crank signals not correct. P0015 CNG Fuel System Pressure Too High PWM O2 Heater Performance Evaporative Emission Control System Leak Detected (very small leak). P0417 Neither rich or lean condition is detected from the oxygen sensor input. P1492 (M or G) Mass or Volume Air Flow Circuit High Input 0200-0299 P0799   Leak Detection Pump Sw or Mechanical Fault.

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