Engine Controls - Self-Diagnostics

• Introduction
• Self-Diagnostic System
  • Disconnecting Battery
  • On-Board Diagnostics
    • Hard Failures
    • Intermittent Failures
  • Indicator Lights
    • Notes
    • Malfunction Indicator Light (MIL)
    • Emission Maintenance Reminder Light
    • Resetting Emission Maintenance Reminder Light
  • Freeze Frame Data
  • Retrieving Diagnostic Trouble Codes
  • Clearing Trouble Codes
  • Relieving Fuel Pressure
  • Test Equipment
• Drive Cycles
  • Notes
  • Drive Cycle: "A"
  • Drive Cycle: "B"
  • Drive Cycle: "C"
  • Drive Cycle: "D"
• System Monitors
  • Notes
  • Air Mass Flow Meter Monitoring
  • Air Temperature Sensor Monitoring
  • Catalyst Monitoring
  • Coolant Temperature Sensor Monitoring
  • Crankshaft & Cam Position Sensor Monitoring
  • Engine Control Module Self Test Monitoring
  • Fuel Evaporative System Monitoring
  • Fuel Injectors Monitoring
  • Fuel Level Sensor Monitoring
  • Fuel Tank Pressure Sensor Monitoring
  • Fuel Temperature Sensor Monitoring
  • Idle Speed Control Monitoring
  • Ignition Coils Monitoring
  • Knock Sensor Monitoring
  • Malfunction Indicator Lamp Monitoring
  • Misfire Monitoring
  • Neutral/Drive Switch Monitoring
  • Oxygen Sensor & Fuel System Monitoring
  • Oxygen Sensor Heater Monitoring
  • Power Supplies Monitoring
  • Purge Canister Closure Valve Monitoring
  • Rough Road Signal Monitoring
  • Throttle Position Sensor Monitoring
  • Vehicle Speed Signal Monitoring
• Summary
• Diagnostic Trouble Code Identification
• Connector Identification
  • Data Link Connector (DLC) Location
  • ECM Connector Identification
• Diagnostic Tests
  • Notes
  • DTC P0101-P0103: Mass Air Flow (MAF) Sensor Circuit
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0111-P0113: Intake Air Temperature (IAT) Sensor Circuit
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0116-P0118, P0125: Engine Coolant Temperature (ECT) Sensor Circuit
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0121-P0123: Throttle Position (TP) Sensor Circuit
    • Notes
    • Description
    • Diagnostic Aids
  • DTCS P0130-P0133, P0136-P0139, P0150-P0153, P0156-P159, P0171-P0172, P0174-P0175, P1137-P1139, P1157-P1159, P1171-P1172 & P1185-P1196: Ho2S Circuit Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0181-P0183: Engine Fuel Temperature (Eft) Sensor
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0201-P0208 & P1201-P1208: Fuel Injector Circuit Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0300-P0308: Misfire Detected In One Or More Cylinders
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0326-P0328 & P0331-P0333: Knock Sensor (KS) Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0335 & P0336: Crankshaft Position (CKP) Sensor Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0340: Camshaft Position (CMP) Sensor Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0420 & P0430: Catalytic Converter Efficiency Low
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0441 & P0443: Pre-Advanced EVAP System Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0442, P0446, P1440, P1447, P1448 & P1496: Advanced EVAP System Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0451, P0452 & P0453: Fuel Tank Pressure Sensor Malfunction
    • Notes
    • Description
    • Diagnostic Aids (Discovery)
  • DTC P0460-P0461: Fuel Level Sensor Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0500: Vehicle Speed Sensor (VSS) Signal Out Of Range
    • Notes
    • Description (Defender 90 & Discovery)
    • Diagnostic Aids (Defender 90 & Discovery)
  • DTC P0506-P0507 & P1508-P1509: Idle Air Control (IAC) Valve
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0560, P0562 & P0563: Battery & Charging System Voltage Inconsistent
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P0605: ECM Data Corrupted
  • DTC P1137-P1139: Primary Ho2S "A" Circuit Malfunction
  • DTC P1157-P1159: Primary Ho2S "B" Circuit Malfunction
  • DTC P1171-P1172: Ho2S Too Lean/Rich Malfunction
  • DTC P1176-P1177: FMFR Correction At Maximum Positive/Negative Valve
  • DTC P1178-P1179: AMFR Correction At Maximum Positive/Negative Valve
  • DTC P1185-P1196: Ho2S Heater Malfunction
  • DTC P1313-P1315: Misfire Detected
  • DTC P1201-P1208: Fuel Injector Circuit Malfunction
  • DTC P1316: Misfire Causing Excessive Emissions
  • DTC P1317-P1318: Rough Road Signal Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P1361-P1364 & P1371-P1374: Ignition Coil Activation Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P1514, P1516, & P1517: Park/Neutral Switch Malfunction
    • Notes
    • Description
    • Diagnostic Aids
  • DTC P1607: Malfunction Indicator Light (Mil) Malfunction
  • DTC P1621-P1622: Security Signal Malfunction
    • Description
    • Diagnostic Aids
• Wiring Diagrams