Engine Performance System Self-Diagnostics

• Introduction
• Self-Diagnostic System
  • Malfunction Indicator Light (Mil)
    • Notes
    • Hard Failures
    • Intermittent Failures
  • Retrieving Diagnostic Trouble Codes
    • Notes
    • Using Malfunction Indicator Light (MIL)
    • Using Scan Tool
  • Freeze Frame Data
  • Pcm Reset Procedure/Clearing Diagnostic Trouble Codes
    • Notes
    • Without Scan Tool
    • Using OBD-II Scan Tool
  • Pcm Location
• Test Equipment
• Drive Cycles
• Summary
• Diagnostic Trouble Code Definitions
• Connector Identification
• Diagnostic Circuit Check
  • Notes
  • Malfunction Indicator Light (Mil) Circuit Troubleshooting (2001-03 3.5RL)
  • Malfunction Indicator Light (Mil) Circuit Troubleshooting (2004 3.5RL)
• Diagnostic Tests
  • DTC P0107: Manifold Absolute Pressure (Map) Sensor Circuit Low Voltage
  • DTC P0108: Manifold Absolute Pressure (Map) Sensor Circuit High Voltage
  • DTC P0112: Intake Air Temperature (IAT) Sensor Circuit Low Voltage
  • DTC P0113: Intake Air Temperature (IAT) Sensor Circuit High Voltage
  • DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0117: Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
  • DTC P0118: Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
  • DTC P0122: Throttle Position (TP) Sensor Circuit Low Voltage
  • DTC P0123: Throttle Position (TP) Sensor Circuit High Voltage
  • DTC P0125: Engine Coolant Temperature (ECT) Sensor Slow Response (2004 3.5RL)
  • DTC P0131: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Circuit Low Voltage (Bank 1 - Sensor 1) Or DTC P0151: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Circuit Low Voltage (Bank 2 - Sensor 1)
  • DTC P0132: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Circuit High Voltage (Bank 1 - Sensor 1) Or DTC P0152: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Circuit High Voltage (Bank 2 - Sensor 1)
  • DTC P0133: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Slow Response (Bank 1 - Sensor 1) Or DTC P0153: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Slow Response (Bank 2 - Sensor 1) (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0133: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Slow Response (Bank 1 - Sensor 1) Or DTC P0153: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Slow Response (Bank 2 - Sensor 1) (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0134: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Heater System Malfunction Or DTC P0154: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Heater System Malfunction (2004 3.5RL)
  • DTC P0135: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Heater Circuit Malfunction (Bank 1 - Sensor 1); DTC P0141: Secondary Heated Oxygen Sensor (Secondary Ho2S) Heater Circuit Malfunction (Sensor 2) Or DTC P0155: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Heater Circuit Malfunction (Bank 2 - Sensor 1)
  • DTC P0137: Secondary Heated Oxygen Sensor (Secondary Ho2S) Circuit Low Voltage (Sensor 2)
  • DTC P0138: Secondary Heated Oxygen Sensor (Secondary Ho2S) Circuit High Voltage (Sensor 2)
  • DTC P0139: Secondary Heated Oxygen Sensor (Secondary Ho2S) Slow Response (Sensor 2)
  • DTC P0171: Fuel System Too Lean (Right Bank - Bank 1); DTC P0172: Fuel System Too Rich (Right Bank - Bank 1); DTC P0174: Fuel System Too Lean (Left Bank - Bank 2) Or DTC P0175: Fuel System Too Rich (Left Bank - Bank 2) (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0171: Fuel System Too Lean (Right Bank - Bank 1); DTC P0172: Fuel System Too Rich (Right Bank - Bank 1); DTC P0174: Fuel System Too Lean (Left Bank - Bank 2) Or DTC P0175: Fuel System Too Rich (Left Bank - Bank 2) (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0300: Random Misfire & Any Combination Of: DTC P1201/1301: No. 1 Cylinder Misfire; DTC P1201/1302: No. 2 Cylinder Misfire; DTC P1203/1303: No. 3 Cylinder Misfire; DTC P1204/1304: No. 4 Cylinder Misfire; DTC P1205/1305: No. 5 Cylinder Misfire; DTC P1206/1306: No. 6 Cylinder Misfire (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0300: Random Misfire & Any Combination Of: DTC P1201/1301: No. 1 Cylinder Misfire; DTC P1201/1302: No. 2 Cylinder Misfire; DTC P1203/1303: No. 3 Cylinder Misfire; DTC P1204/1304: No. 4 Cylinder Misfire; DTC P1205/1305: No. 5 Cylinder Misfire; DTC P1206/1306: No. 6 Cylinder Misfire (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0325: Right Knock Sensor (Bank 1) Circuit Malfunction Or DTC P0330: Left Knock Sensor (Bank 2) Circuit Malfunction
  • DTC P0335: Crankshaft Position (CKP) 1 Sensor Circuit No Signal; DTC P0336: Crankshaft Position (CKP) 1 Sensor Intermittent Interruption; DTC P1336: Crankshaft Position (CKP) 2 Sensor Circuit Intermittent Interruption; DTC P1337: Crankshaft Position (CKP) 2 Sensor Circuit No Signal; DTC P1381: Cylinder Position (CYP) 1 Sensor Intermittent Interruption; DTC P1382: Cylinder Position (CYP) 1 Sensor Circuit No Signal; DTC P1386: Camshaft Position (CMP)/Cylinder Position (CYP) 2 Sensor Intermittent Interruption Or DTC P1387: Camshaft Position (CMP)/Cylinder Position (CYP) 2 Sensor Circuit No Signal (2001-03 3.5RL)
  • DTC P0345: Crankshaft Position (CKP) 1 Sensor Circuit No Signal; DTC P0349: Crankshaft Position (CKP) 1 Sensor Intermittent Interruption; DTC P0390: Camshaft Position (CMP)/Cylinder Position (CYP) 1 Sensor Circuit No Signal; DTC P0394: Camshaft Position (CMP)/Cylinder Position (CYP) 1 Sensor Intermittent Interruption; DTC P1336: Crankshaft Position (CKP) 2 Sensor Circuit Intermittent Interruption; DTC P1337: Crankshaft Position (CKP) 2 Sensor Circuit No Signal; DTC P1386: Camshaft Position (CMP)/Cylinder Position (CYP) 2 Sensor Intermittent Interruption Or DTC P1387: Camshaft Position (CMP)/Cylinder Position (CYP) 2 Sensor Circuit No Signal (2004 3.5RL)
  • DTC P0401: Exhaust Gas RECIRCULATION (EGR) Insufficient Flow
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0404: Exhaust Gas RECIRCULATION (EGR) Valve Insufficient Lift (2004 3.5RL)
  • DTC P0406: EGR Valve Lift Sensor High Voltage (2004 3.5RL)
  • DTC P0420: Catalyst System Efficiency Below Threshold
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0451: Fuel Tank Pressure (Ftp) Sensor Circuit Range/Performance Problem
  • DTC P0452: Fuel Tank Pressure (Ftp) Sensor Circuit Low Voltage
  • DTC P0453: Fuel Tank Pressure (Ftp) Sensor Circuit High Voltage
  • DTC P0497: Evaporative Emission (EVAP) System Low Purge Flow (2004 3.5RL)
  • DTC P0505: Idle Control System Malfunction (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0506: Idle Control System Rpm Lower Than Expected (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0507: Idle Control System Rpm Higher Than Expected (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P0511: Idle Air Control (IAC) Valve Circuit Failure (2004 3.5RL)
  • DTC P0560: Pcm Back-Up Circuit Low Voltage
  • DTC P0607: Powertrain Control Module (Pcm) Internal Circuit Failure (2004 3.5RL)
  • DTC P1106: Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem (2001-03 3.5RL)
  • DTC P1107: Barometric Pressure (BARO) Sensor Circuit Low Voltage Or DTC P1108: Barometric Pressure (BARO) Sensor Circuit High Voltage (2001-03 3.5RL)
  • DTC P1121: Throttle Position (TP) Sensor Signal Lower Than Expected
  • DTC P1122: Throttle Position (TP) Sensor Signal Higher Than Expected
  • DTC P1128: Manifold Absolute Pressure (Map) Sensor Signal Lower Than Expected
  • DTC P1129: Manifold Absolute Pressure (Map) Sensor Signal Higher Than Expected
  • DTC P1201/P1301: No. 1 Cylinder Misfire Detected; DTC P1202/P1302: No. 2 Cylinder Misfire Detected; DTC P1203/P1303: No. 3 Cylinder Misfire Detected; DTC P1204/1304: No. 4 Cylinder Misfire Detected; DTC P1205/P1305: No. 5 Cylinder Misfire Detected Or DTC P1206/P1306: No. 6 Cylinder Misfire Detected (2001-03 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P1201/P1301: No. 1 Cylinder Misfire Detected; DTC P1202/P1302: No. 2 Cylinder Misfire Detected; DTC P1203/P1303: No. 3 Cylinder Misfire Detected; DTC P1204/1304: No. 4 Cylinder Misfire Detected; DTC P1205/P1305: No. 5 Cylinder Misfire Detected Or DTC P1206/P1306: No. 6 Cylinder Misfire Detected (2004 3.5RL)
    • Notes
    • Possible Causes
    • Diagnostic Procedure
  • DTC P1316: Spark Plug Voltage Detection Circuit Malfunction (Left Bank/Bank 2) Or DTC P1317: Spark Plug Voltage Detection Circuit Malfunction (Right Bank/Bank 1)
  • DTC P1318: Spark Plug Voltage Detection Module Reset Circuit Malfunction (Left Bank/Bank 2) Or DTC P1319: Spark Plug Voltage Detection Module Reset Circuit Malfunction (Right Bank/Bank 1)
  • DTC P1456: Evaporative Emission (EVAP) Control System Leakage (Fuel Tank System) (2001-03 3.5RL)
    • Notes
    • Fuel Tank Vapor Control Valve Float Test
    • Fuel Tank Vapor Control Valve Test
    • EVAP 2-Way Valve Test
  • DTC P1456: Evaporative Emission (EVAP) Control System Leakage (Fuel Tank System) (2004 3.5RL)
  • DTC P1457: Evaporative Emission (EVAP) Control System Leakage (EVAP Canister Area) (2001-03 3.5RL)
  • DTC P1457: Evaporative Emission (EVAP) Control System Leakage (EVAP Canister Area) (2004 3.5RL)
  • DTC P1486: Cooling System Malfunction (2001-03 3.5RL)
  • DTC P1486: Cooling System Malfunction (2004 3.5RL)
  • DTC P1491: Exhaust Gas RECIRCULATION (EGR) Valve Insufficient Lift (2001-03 3.5RL)
  • DTC P1498: EGR Valve Lift Sensor High Voltage (2001-03 3.5RL)
  • DTC P1508: Idle Air Control (IAC) Valve Circuit Failure (2001-03 3.5RL)
  • DTC P1607: Powertrain Control Module (Pcm) Internal Circuit Failure (2001-03 3.5RL)
  • DTC P2195: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Circuit Low Voltage (Bank 1 - Sensor 1) Or DTC P2197: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Circuit Low Voltage (Bank 2 - Sensor 1) (2004 3.5RL)
  • DTC P2227: Barometric Pressure (BARO) Sensor Circuit Range/Performance Problem (2004 3.5RL)
  • DTC P2228: Barometric Pressure (BARO) Sensor Circuit Low Voltage Or DTC P2229: Barometric Pressure (BARO) Sensor Circuit High Voltage (2004 3.5RL)
  • DTC P2297: Right Primary Heated Oxygen Sensor (Right Primary Ho2S) Circuit High Voltage (Bank 1 - Sensor 1) Or DTC P2298: Left Primary Heated Oxygen Sensor (Left Primary Ho2S) Circuit High Voltage (Bank 2 - Sensor 1) (2004 3.5RL)