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Symptom Troubleshooting [Engine] Expand All (for easy ctrl-f) Collapse All Foreword Engine OBD II Monitors Electronic Engine Control (EEC) System On-Board Diagnostic Tests Drive Cycles DTC Index - Powertrain Control Module (Pcm) DTC Application Chart - Powertrain Control Module (Pcm) Pcm Quick Test Notes DTC P0102, P0103, P1100 & P1101: Mass Air Flow (MAF) Sensor DTC P0107, P0108 & P0109: Manifold Absolute Pressure (Map) Sensor Malfunction (2.3L) DTC P0112, P0113, P0117, P0118, P0125, P1112, P1116, P1117, P1285, P1288, P1289, P1290 & P1299: Intake Air Temperature (IAT) Sensor And Engine Coolant Temperature (ECT)/Cylinder Head Temperature (CHT) Sensor DTC P0121, P0122, P0123, P1120, P1121, P1124 & P1125: Throttle Position (TP) Sensor Circuit Malfunction DTC P0131 & P0151: Heated Oxygen Sensor (Ho2S) DTC P0133 & P0153: Heated Oxygen Sensors (Ho2S) Upstream DTC P0135, P0141 & P0155: Heated Oxygen Sensor (Ho2S) Heater Circuit DTC P0136, P1137 & P1138: Heated Oxygen Sensor (Ho2S) DTC P0171 & P0174: Adaptive Fuel Control DTC P0172 & P0175: Adaptive Fuel Control DTC P0201, P0202, P0203, P0204, P0205 & P0206: Fuel Injector Malfunction DTC P0230, P0231 & P0232: Fuel Pump (FP) Primary Or Secondary Circuit DTC P0300, P0301, P0302, P0303, P0304, P0305 & P0306: Misfire Detection Monitor DTC P0320: Crankshaft Position (CKP) Sensor Malfunction DTC P0325 & P0326: Knock Sensor Malfunction DTC P0340: Camshaft Position (CMP) Sensor Malfunction DTC P0350: Ignition Coil Primary Circuit Malfunction DTC P0351, P0352, P0353 & P0354: Integrated Ignition Coil 1, 2, 3, Or 4 Failure DTC P0400, P0403 & P1408: Electric EGR (EEGR) System Malfunction - 2.3L DTC P0420 & P0430: Catalyst Efficiency Monitor Malfunction DTC P0442: Evaporative Emission (EVAP) Monitor And System Malfunction DTC P0443: Evaporative Emission (EVAP) Canister Purge Solenoid Malfunction DTC P0461: EVAP System Malfunction DTC P0452: Fuel Tank Pressure (Ftp) Sensor Malfunction DTC P0453: Fuel Tank Pressure (Ftp) Sensor Malfunction DTC P0455 & P1443: Evaporative Emission (EVAP) System Malfunction DTC P0457: Evaporative Emission (EVAP) System Malfunction DTC P0460: Fuel Level Input (FLI) Circuit Malfunction DTC P0505, P1504 & P1507: Idle Air Control (IAC) Valve Assembly Malfunction DTC P0603 & P1633: Powertrain Control Module (Pcm) Malfunction DTC P0703 & P1703: Brake Pedal Position (BPP) Switch Malfunction DTC P0704 & P1709: Clutch Pedal Position (CPP) Switch Malfunction DTC P1000: OBD-II Drive Cycle Malfunction DTC P1001: Data Link Connector (DLC) Malfunction DTC P1127: Ho2S Heater(S) DTC P1128: Heated Oxygen Sensor Ho2S Signals (V6 Only) DTC P1130 & P1150: Fuel System Not Switching At Fuel Trim (Rich Or Lean) DTC P1131 & P1151: Heated Oxygen Sensor (Ho2S) Upstream Not Switching DTC P1132 & P1152: Heated Oxygen Sensor (Ho2S) Upstream Not Switching DTC P1260: Anti-Theft System DTC P1270: Engine Rpm/Vehicle Speed Limiter DTC P1309: Misfire Detection Monitor Disabled DTC P1432: Thermostat Heater Control (THTRC) Malfunction (2.3L) DTC P1450: Evaporative Emission (EVAP) Monitor And System DTC P1451: Canister Vent (CV) Solenoid Malfunction DTC P1460: A/C Clutch Relay (ACCR) Malfunction DTC P1464: A/C Control Signal (ACCS) Malfunction DTC P1474: Cooling Fan Malfunction (2.3L) DTC P1506: Idle Air Control (IAC) System Malfunction DTC P1518, P1519, P1520, P1537 & P1538: Intake Manifold Swirl Control (IMSC) Malfunction (2.3L) DTC P1650 & P1651: Power Steering Pressure (PSP) Switch (2.3L Only) Malfunction DTC P1729 & P1781: Transfer Case Range Malfunction - 4X4 Low (4X4L) DTC P1780: Transmission Control Switch (TCS) Or Transmission Control Indicator Lamp (TCIL) Circuit Malfunction Symptom Troubleshooting Chart Engine DRIVEABILITY Engine Inspection Engine Component Test Engine Oil Leaks - Fluorescent Oil Additive Method Leakage Points - Underhood Leakage Points - Under Engine, With Vehicle on Hoist Leakage Points - With Transmission and Flywheel Removed Compression Test Compression Test - Results Compression Test - Interpreting Compression Readings Cylinder Leakage Detection Oil Leak and Valve Stem Seal Test Oil Consumption Test Excessive Engine Oil Consumption Intake Manifold Vacuum Test Intake Manifold Vacuum Test - Interpreting Vacuum Gauge Readings Oil Pressure Test Valve Train Analysis - Engine Off Valve Train Analysis - Engine Off, Valve Cover Removed Valve Train Analysis - Engine Off, Valve Tappets Valve Train Analysis - Engine Off, Camshaft - Overhead Camshaft Engines Valve Train Analysis - Engine Off, Valve Springs Valve Train Analysis - Engine Off, Valve Spring Retainer and Valve Spring Retainer Keys Valve Train Analysis - Engine Off, Valves and Cylinder Head Valve Train Analysis - Engine Running Valve Train Analysis - Engine Running, Rocker Arm Camshaft Lobe Lift Camshaft Lobe Lift - Valve Tappet, 2.3L, 3.0L and 4.0L Engines Timing Chain - 2.3L, 3.0L and 4.0L Engines Timing Chain Deflection - 2.3L, 3.0L and 4.0L Engines Charging System Component Tests Symptom Troubleshooting Chart - Engine Mechanical Symptom Troubleshooting Chart - Drive Belt Symptom Troubleshooting Chart - Engine Cooling Exhaust System Symptom Chart Evaporative Emission System Inspection Evaporative Emission Symptom Chart Symptom Troubleshooting Chart-Charging System Symptom Troubleshooting Chart - Starting System Symptom Troubleshooting Chart - Cruise Control Symptom Troubleshooting Chart-Powertrain Control Module (Pcm) General Test Index