Engine Controls - Self-Diagnostics - S70 & V70 Non-Turbo

• Introduction
• Self-Diagnostic System
  • Notes
  • On-Board Diagnostics
  • Misfire, Ho2S, Catalytic Converter, Camshaft & Throttle Diagnostics
  • Retrieving & Erasing Codes
    • Notes
    • On-Board Diagnostics (OBD-II)
  • Powertrain Control Module Location
  • Programming
• Summary
• Diagnostic Trouble Code Definitions
• Component Locations
• Connector Identification
• Diagnostic Tests
  • ECM-100A: ECM Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0101/ECM-130A: Mass Air Flow Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0102, P0103/ECM-1300: Mass Air Flow Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Diagnostic Procedure
  • P0106/ECM-140A: Manifold Absolute Pressure Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0107, P0108/ECM-1400: Manifold Absolute Pressure Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0111/ECM-120A: Intake Air Temperature Sensor Inlet
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0112, P0113/ECM-1200: Intake Air Temperature Sensor Inlet
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0116/ECM-200A: Engine Coolant Temperature Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0117, P0118/ECM-2000: Engine Coolant Temperature Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0125/ECM-200F: Engine Coolant Temperature Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0130/ECM-2120: Front Heated Oxygen Sensor, Control Element
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0131, P0132/ECM-2100: Front Heated Oxygen Sensor
    • Fault Conditions
    • Possible Causes (Current Too High, Positive)
    • Possible Causes (Current Too Low, Negative)
    • Diagnostic Procedure
  • P0133/ECM-210A: Front Heated Oxygen Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0133/ECM-210F: Front Heated Oxygen Sensor
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P0135/ECM-2110: Front Heated Oxygen Sensor, Control
    • Fault Conditions
    • Possible Causes (Signal Too Low)
    • Possible Causes (Signal Too High)
    • Diagnostic Procedure
  • P0136/ECM-220A: Rear Heated Oxygen Sensor
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P0136/ECM-220F: Rear Heated Oxygen Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0137, P0138/ECM-2200: Rear Heated Oxygen Sensor
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0141/ECM-2210: Rear Heated Oxygen Sensor, Heating
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Possible Cause (Faulty Signal)
    • Diagnostic Procedure
  • P0171, P0172/ECM-250A: Long-Term Fuel Trim
    • Fault Conditions
    • Possible Causes (Upper Limit)
    • Possible Causes (Lower Limit)
    • Diagnostic Procedure (Upper Limit)
    • Diagnostic Procedure (Lower Limit)
  • P0201-P0205, P0261-P0274/ECM-23X0: Fuel Injector X
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0230/ECM-2400: Fuel Pump Relay
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Cause (Signal Too Low)
    • Possible Cause (Signal Missing)
    • Diagnostic Procedure
  • P0300-P0305/ECM-3502: Misfire, At Least One Cylinder
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0300-P0305/ECM-3503: Misfire, At Least One Cylinder
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0326/ECM-340A: Knock Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0327, P0328/ECM-3400: Knock Sensor, Test Pulse
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0335/ECM-3100: Engine Speed Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0336, P0339/ECM-310A: Engine Speed Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0340/ECM-3000: Camshaft Position Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0341/ECM-300A: Camshaft Position Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0350/ECM-3200: Ignition Coil
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0351-P0355/ECM-33X0: Ignition Coil X
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0420/ECM-4201: Three-Way Catalytic Converter Efficiency
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0440/ECM-4047: Canister Purge Valve/Canister Shut-Off Valve
    • Fault Conditions
    • Possible Causes (EVAP Canister Shut-Off Valve Leakage)
    • Possible Causes (Canister Purge Valve Leakage)
    • Possible Causes (EVAP Canister Shut-Off Valve Clogged)
    • Preliminary Checks
    • Fuel Tank Quick Test
    • Diagnostic Procedure
    • Checking Fuel Tank Pressure Sensor
    • Checking Canister Purge (CP) Valve
    • Checking Hoses
    • Checking Vacuum Downstream Of The Canister Purge (CP) Valve
    • Checking The Vacuum At The EVAP Canister
    • Checking The EVAP Canister
    • Checking Hose Between EVAP Canister & Canister Purge Valve
    • Checking The Hose Between The Fuel Tank & The EVAP Canister
    • Checking The Canister Purge Valve Vacuum
    • Checking Canister Purge Valve
    • Checking Fuel Tank Pressurization
    • Verification
  • P0442, P0455/ECM-4308: Leak Diagnosis
    • Fault Conditions
    • Possible Causes (Major Leak)
    • Possible Causes (Minor Leak)
    • Diagnostic Procedure
  • P0443/ECM-4000: Canister Purge Valve
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0446/ECM-4010: EVAP Canister Shut-Off Valve
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0451/ECM-402A: Fuel Tank Pressure Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0452, P0453/ECM-4020: Fuel Tank Pressure Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0480/ECM-6110: Engine Cooling Fan Relay, Low Speed
    • Diagnostic Procedure
  • P0481/ECM-6120: Engine Cooling Fan Relay, High Speed
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal too Low)
    • Diagnostic Procedure
  • P0505/ECM-6200: AACV
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0505/ECM-6207: AACV
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0506, P0507/ECM-620A: Idling Speed
    • Fault Conditions
    • Possible Cause (Idle Speed Too High)
    • Possible Cause (Idle Speed Too Low)
    • Diagnostic Procedure
  • P0531/ECM-500A: A/C Pressure Sensor
    • Notes
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0532, P0533/ECM-5000: A/C Pressure Sensor
    • Notes
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P0560/ECM-820A: System Relay
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0562, P0563/ECM-8010: Battery Voltage
    • Fault Conditions
    • Possible Causes (Charge voltage Too High/Too Low)
    • Diagnostic Procedure
  • P0600/ECM-901A: Communication Control Module, Communication Problems
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-911A: Throttle Unit Communication
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-A00B: Communication, Transmission Control Module
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-A02B: Communication, Abs Control Module
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-A03B: Communication, Can & Driver Information Module
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-E000: Control Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0600/ECM-E003: Control Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0603/ECM-8000: +30 Supply To Control Module
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P0608/ECM-8400: 5 Volt Power Supply
    • Fault Conditions
    • Possible Causes(Signal Too High)
    • Possible Cause(Signal Too Low)
    • Diagnostic Procedure
  • P0645/ECM-6000: A/C Relay Signal
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P1001-P1003/ECM-1000: ECM Internal Fault
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P1004, P1005/ECM-150A: Mass Air Flow Sensor
    • Fault Conditions
    • Possible Causes (Upper Limit)
    • Possible Causes (Lower Limit)
    • Diagnostic Procedure
  • P1007/ECM-5200: Starter Motor Signal
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P1008/ECM-6300: ETS Lamp Output
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1009/ECM-6310: ETS Warning Lamp
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1010/ECM-710A: Can Communication
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1011/ECM-7110: ECM, Internal Fault
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1012/ECM-7120: ECM, Internal Fault
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1017/ECM-900E: ECM, Internal Fault
    • Fault Conditions
    • Possible Cause (Faulty Signal 1-11)
    • Possible Causes (Faulty Signal 12)
    • Diagnostic Procedure (1-11)
    • Diagnostic Procedure (12)
  • P1019/ECM-902A: Throttle Unit Communication Problems
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1020/ECM-902B: Throttle Unit Communication
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1021/ECM-903F: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1022/ECM-910E: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1024/ECM-912A: Engine Control Module Communication
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1025/ECM-913F: Engine Control Module Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1026/ECM-914F: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1027/ECM-9150: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1028/ECM-9160: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1029/ECM-917F: Accelerator Pedal Position Sensor, Internal Fault
    • Notes
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1030/ECM-9180: Accelerator Pedal Position Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1031/ECM-9190: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1032/ECM-91A7: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1033/ECM-91B7: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1034/ECM-91CF: Engine Control Module Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1035/ECM-91DF: Stop Lamp Switch
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1036/ECM-91E0: Battery Voltage
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1037/ECM-9200: Cruise Control
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Cause (Faulty Signal)
    • Diagnostic Procedure (Faulty Signal)
    • Diagnostic Procedure (Signal Too High)
  • P1038/ECM-921F: Clutch Pedal Sensor
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1040/ECM-9300: Clutch Pedal Position Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Possible Causes (Faulty Signal)
    • Diagnostic Procedure
  • P1041/ECM-9400: Brake Pedal Position Sensor, Faulty Signal
    • Notes
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Possible Causes (Faulty Signal)
    • Diagnostic Procedure
  • P1042/ECM-950F: Accelerator Pedal Position Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1043/ECM-9520: Accelerator Pedal Position Sensor
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Possible Causes (Signal Missing)
    • Possible Causes (Faulty Signal)
    • Diagnostic Procedure
  • P1044/ECM-9530: Accelerator Pedal Position Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes (Signal Too Low)
    • Diagnostic Procedure
  • P1045/ECM-9540: 5 Volt Power Supply
    • Fault Conditions
    • Possible Cause (Signal Too High)
    • Possible Cause (Signal Too Low)
    • Diagnostic Procedure
  • P1046, P1047/ECM-7140: ECM, Internal Fault
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • P1048/ECM-715D: ECM, Temperature Too High
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1049/ECM-716D: ECM, Temperature Too High
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1052/ECM-951F: Accelerator Pedal Position Sensor, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1053/ECM-91F0: Throttle Unit, Internal Fault
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1054/ECM-510D: Vehicle Speed Signal
    • Fault Conditions
    • Diagnostic Procedure
  • P1055/ECM-918F: Accelerator Pedal Position Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1056/ECM-941F: Brake Pedal Sensor, Faulty Signal
    • Notes
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1057/ECM-530D: DTC In Transmission Control Module
    • Fault Conditions
    • Diagnostic Procedure
  • P1058/531D: DTC In Combined Instrument Panel
    • Fault Conditions
    • Possible Cause
  • P1059/ECM-532D: Mil Requested By Throttle Unit
    • Fault Conditions
    • Diagnostic Procedure
  • P1072, P1073/ECM-1100: Outside Temperature Sensor
    • Fault Conditions
    • Possible Causes (Signal Too High)
    • Possible Causes Signal Too Low)
    • Diagnostic Procedure
  • P1074/ECM-110A: Outside Temperature Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • P1081/ECM-720A: Immobilizer Communication
    • Fault Conditions
    • Possible Causes (Faulty Communication)
    • Possible Causes (No Communication)
    • Possible Causes (Incorrect VIN Code)
    • Diagnostic Procedure (Incorrect VIN Code)
    • No Communication Or Faulty Communication
  • P1082/ECM-D00E: Front Heated Oxygen Sensor
    • Fault Conditions
    • Possible Cause
    • Diagnostic Procedure
  • ECM-4050: Fuel Level Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • ECM-405A: Fuel Level Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • ECM-930A: Clutch Pedal Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • ECM-980F: MAF Or Map Sensor
    • Fault Conditions
    • Possible Causes
    • Diagnostic Procedure
  • ECM-XXXX: Unknown DTC For Current Control Module Version
    • Diagnostic Procedure
• Connecting & Disconnecting Breakout Box
  • Notes
  • Connecting
  • Disconnecting
• Checking Wiring & Connections
  • Contact Resistance & Oxidation
  • Cleaning Female Sockets & Male Terminals
  • Applying Grease To Terminals