Section 13 (Engine Controls - Self-Diagnostics)
WARNING: This page is about a different car, the 2003 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Fuel System Pressure Release
- Programming
- Drive Cycles
- Summary
- Diagnostic Trouble Code Definitions
- Component Locations
- A/C Compressor Clutch, A/C Pressure Transducer, Coil On Plug No. 2, 4 & 6, ECT Sensor, Fuel Injector No. 2, 4 & 6 & Map Sensor Connectors & Grounds, & Splices Locations (3.7L)
- Battery Temperature Sensor Location
- BCM Location
- CMP Sensor Location (2.4L)
- CMP Sensor Location (3.7L)
- Coil On Plug No. 1, 3 & 5, Fuel Injector No. 1, 3 & 5, IAC Motor, IAT Sensor, Knock Sensor & TP Sensor Connectors, & Splices Locations (3.7L)
- Coil Rail, Capacitor, 1/2 Ho2S & Transfer Case Position Sensor Connectors & Grounds, & Splices Locations (2.4L)
- CKP Sensor Locations (2.4L)
- CKP Sensor Locations (3.7L)
- Data Link Connector Location
- ECT Sensor Location (2.4L)
- ECT & Map Sensors Locations (3.7L)
- EVAP Purge Solenoid, Pcm & Power Distribution Center Locations
- Fuel Delivery Components At Fuel Tank Locations
- IAC Motor & TP Sensor Locations (2.4L)
- IAT Sensor Location (2.4L)
- IAT Sensor Location (3.7L)
- Input Speed Sensor, Output Speed Sensor, 1/2 Ho2S & Transfer Case Position Sensor Connectors, & Splice S161 Locations (3.7L)
- Knock Sensor Locations (3.7L)
- Map Sensor Locations (2.4L)
- Oil Pressure Sensor Locations (2.4L)
- Oil Pressure Sensor Locations (3.7L)
- Radiator Fan Relay & Horn Connectors, Grounds, & Splices Locations
- TCM And Speed Control Servo Locations
- TCM Locations
- O2 Sensor Location (2.4L)
- O2 Sensor Locations (3.7L)
- Connector Identification
- A/C Clutch Relay, Fuel Pump Relay & Oxygen Sensor Downstream Relay Connector End View
- A/C Compressor Clutch Harness Connector End View
- A/C Low Pressure Switch Harness Connector End View
- A/C Pressure Transducer Harness Connector End View
- Ambient Temperature Sensor Harness Connector End View
- AMBIENT TEMPERATURE SENSOR CONNECTOR END VIEW (Component Side)
- Auto Shutdown Relay Connector End View
- Battery Temperature Sensor Harness Connector End View
- BCM Harness Connector End View
- Brake Lamp Switch Harness Connector End View
- Brake Pressure Switch Harness Connector End View
- CMP Sensor Harness Connector End View (2.4L)
- CMP Sensor Harness Connector End View (3.7L)
- Capacitor Harness Connector End View (2.4L)
- CLOCKSPRING Harness Connector End View
- Clutch Interlock Switch Harness Connector End View (M/T)
- Coil On Plug Harness Connector End View (3.7L)
- Coil Rail Harness Connector End View (2.4L)
- CKP Sensor Harness Connector End View (2.4L)
- CKP Sensor Harness Connector End View (3.7L)
- Data Link Connector End View
- Diagnostic Junction Port Connector End View
- ECT Sensor Harness Connector End View
- Engine Oil Pressure Switch Harness Connector End View
- EVAP Purge Solenoid Harness Connector End View
- Fuel Injector Harness Connector End View
- Fuel Pump Module Harness Connector End View
- Generator Harness Connector End View
- Idle Air Control Motor Harness Connector End View
- Ignition Switch Harness Connector End View
- IAT Sensor Harness Connector End View
- Junction Block Outboard Fuses Identification
- Knock Sensor Harness Connector End View (3.7L)
- Leak Detection Pump Harness Connector End View
- Speed Control Switch Connector End View
- Map Sensor Harness Connector End View
- Output Speed Sensor Harness Connector End View (3.7L)
- Output Speed Sensor Connector End View (Component Side - 3.7L)
- O2 Sensor Connector End View
- Power Distribution Center Fuses & Fuse Circuits Identification
- Power Distribution Center Relay Cavities & Circuits Identification
- Power Distribution Center Relay Cavities & Circuits
- Power Steering Pressure Switch Harness Connector End View
- Pcm Harness Connector End View
- Radiator Fan Motor Harness Connector End View
- Radiator Fan Relay Harness Connector End View
- Rear Wheel Speed Sensor Harness Connector End View
- Speed Control Switch Harness Connector End View
- Sentry Key Immobilizer Module Harness Connector End View
- Speed Control Servo Harness Connector End View
- TP Sensor Harness Connector End View
- Trailer Tow Brake Lamp Relay Connector End View
- TCM Harness Connector End View
- Diagnostic Tests
- Notes
- DTC P0031: 1/1 O2 Sensor Heater Circuit Low, DTC P0032: 1/1 O2 Sensor Heater Circuit High, DTC P0037: 1/2 O2 Sensor Heater Circuit Low, DTC P0038: 1/2 O2 Sensor Heater Circuit High, DTC P0051: 2/1 O2 Sensor Heater Circuit Low Or DTC P0052: 2/1 O2 Sensor Heater Circuit High
- DTC P0071: Battery Temp Sensor Performance
- DTC P0107: Map Sensor Voltage Too Low
- DTC P0108: Map Sensor Voltage Too High
- DTC P0111: Intake Air Temp Sensor Performance
- DTC P0112: Intake Air Temp Sensor Voltage Low
- DTC P0113: Intake Air Temp Sensor Voltage High
- DTC P0117: ECT Sensor Voltage Too Low
- DTC P0118: ECT Sensor Voltage Too High
- DTC P0121: TPS Voltage Does Not Agree With Map
- DTC P0122: Throttle Position Sensor Voltage Low
- DTC P0123: Throttle Position Sensor Voltage High
- DTC P0125: Closed Loop Temp Not Reached
- DTC P0131: 1/1 O2 Sensor Shorted To Ground, DTC P0137: 1/2 O2 Sensor Shorted To Ground, DTC P0151: 2/1 O2 Sensor Shorted To Ground Or DTC P0157: 2/2 O2 Sensor Shorted To Ground
- DTC P0132: 1/1 O2 Sensor Shorted To Voltage, DTC P0138: 1/2 O2 Sensor Shorted To Voltage, DTC P0152: 2/1 O2 Sensor Shorted To Voltage Or DTC P0158: 2/2 O2 Sensor Shorted To Voltage
- DTC P0133: 1/1 O2 Sensor Slow Response, DTC P0139: 1/2 O2 Sensor Slow Response, DTC P0153: 2/1 O2 Sensor Slow Response Or DTC P0159: 2/2 O2 Sensor Slow Response
- DTC P0135: 1/1 O2 Sensor Heater Failure, DTC P0141: 1/2 O2 Sensor Heater Failure, DTC P0155: 2/1 O2 Sensor Heater Failure Or DTC P0161: 2/2 O2 Sensor Heater Failure
- DTC P0136: 1/2 O2 Sensor Heater Circuit Malfunction
- DTC P0171: 1/1 Fuel System Lean Or DTC P0174: 2/1 Fuel System Lean
- DTC P0172: 1/1 Fuel System Rich Or DTC P0175: 2/1 Fuel System Rich
- DTC P0201: Injector #1 Control Circuit, DTC P0202: Injector #2 Control Circuit, DTC P0203: Injector #3 Control Circuit, DTC P0204: Injector #4 Control Circuit, DTC P0205: Injector #5 Control Circuit Or DTC P0206: Injector #6 Control Circuit
- DTC P0300: Multiple Cylinder Misfire, DTC P0301: Cylinder #1 Misfire, DTC P0302: Cylinder #2 Misfire, DTC P0303: Cylinder #3 Misfire, DTC P0304: Cylinder #4 Misfire, DTC P0305: Cylinder #5 Misfire Or DTC P0306: Cylinder #6 Misfire
- DTC P0320: No Crank Reference Signal At Pcm
- DTC P0325: Knock Sensor #1 Circuit, DTC P0330: Knock Sensor #2 Circuit
- DTC P0340: No Cam Signal At Pcm
- DTC P0351: Ignition Coil #1 Primary Circuit (2.4L) Or DTC P0352: Ignition Coil #2 Primary Circuit (2.4L)
- DTC P0351: Ignition Coil #1 Primary Circuit (3.7L), DTC P0352: Ignition Coil #2 Primary Circuit (3.7L), DTC P0353: Ignition Coil #3 Primary Circuit (3.7L), DTC P0354: Ignition Coil #4 Primary Circuit (3.7L), DTC P0355: Ignition Coil #5 Primary Circuit (3.7L) Or DTC P0356: Ignition Coil #6 Primary Circuit (3.7L)
- DTC P0420: 1/1 Catalytic Converter Efficiency Or DTC P0432: 2/1 Catalytic Converter Efficiency
- DTC P0441: EVAP Purge Flow Monitor Failure
- DTC P0442: EVAP Leak Monitor Medium (.040") Leak Detected, DTC P0455: EVAP Leak Monitor Large Leak Detected Or DTC P0456: EVAP Leak Monitor Small (.020") Leak Detected
- DTC P0443: EVAP Purge Solenoid Circuit
- DTC P0460: Fuel Level Unit No Change Over Miles Or DTC P0461: Fuel Level Unit No Change Over Time
- DTC P0462: Fuel Level Sending Unit Volts Too Low
- DTC P0463: Fuel Level Sending Unit Volts Too High
- DTC P0500: No Vehicle Speed Sensor Signal
- DTC P0505: Idle Air Control Motor Circuits
- DTC P0523: Oil Pressure Sensor Voltage Too High
- DTC P0551: Power Steering Switch Failure
- DTC P0601: Pcm Internal Controller Failure
- DTC P0622: Generator Field Not Switching Properly
- DTC P0645: A/C Clutch Relay Circuit
- DTC P0700: EATX Controller DTC Present
- DTC P1195: 1/1 O2 Sensor Slow During Catalyst Monitor Or DTC P1196: 2/1 O2 Sensor Slow During Catalyst Monitor
- DTC P1281: Engine Is Cold Too Long
- DTC P1282: Fuel Pump/System Relay Control Circuit
- DTC P1294: Target Idle Not Reached
- DTC P1296: No 5 Volts To Map Sensor
- DTC P1297: No Change In Map From Start To Run
- DTC P1299: Vacuum Leak Found
- DTC P1388: Auto Shutdown Relay Control Circuit
- DTC P1389: No ASD Relay Output Voltage At Pcm
- DTC P1391: Intermittent Loss Of CMP Or CKP
- DTC P1398: Misfire Adaptive Numerator At Limit
- DTC P1486: EVAP Leak Monitor Pinched Hose Found
- DTC P1491: Rad Fan Control Relay Circuit
- P1492: Battery Temperature Sensor Voltage Too High
- P1493: Ambient/Battery Temperature Sensor Voltage Too Low
- DTC P1494: Leak Detection Pump SW Or Mechanical Fault
- DTC P1495: Leak Detection Pump Solenoid Circuit
- P1594: Charging System Voltage Too High
- P1595: Speed Control Servo Solenoid Circuits, P1683: Speed Control Power Circuit
- P1596: Speed Control Switch Always High
- P1597: Speed Control Switch Always Low
- DTC P1598: A/C Pressure Sensor Volts Too High
- DTC P1599: A/C Pressure Sensor Volts Too Low
- P1682: Charging System Voltage Too Low
- DTC P1685: Wrong Or Invalid Key MSG Received From Skim
- DTC P1686: No Skim Bus Message Received
- DTC P1687: No Cluster Bus Message
- DTC P1696: Pcm Failure EEPROM Write Denied
- DTC P1698: No Bus Message From Trans Control Module
- DTC P1830: Clutch Override Relay Control Circuit
- P1899: P/N Switch Performance
- Verification Tests
- Wiring Diagrams