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Engine General Information And Diagnosis Expand All (for easy ctrl-f) Collapse All Precautions General Description Schematic and Routing Diagram Component Location Diagnostic Information and Procedures Engine and Emission Control System Check Malfunction Indicator Lamp (MIL) Check DTC Check DTC Clearance Troubleshooting for Communication Error with Scan Tool Using CAN DTC Table Fail-Safe Table Scan Tool Data ECM Scan Tool Data Definitions Fuel System (Fuel System Status) Short Term Fuel Trim (%) Long Term Fuel Trim (%) Total Fuel Trim (%) Inj Pulse Width (Fuel Injection Pulse Width, msec.) Ignition Advance (Ignition Timing Advance for NO. 1 Cylinder, ° BTDC) Calculated Load (Calculated Load Value, %) Engine Speed (rpm) Desired Idle (Desired Idle Speed, rpm) MAF (Mass Air Flow rate, g/sec, lb/min.) Vehicle Speed (km/h, mph) ECT (Engine Coolant Temperature, °C, °F) Intake Air Temperature. (°C, °F) Barometric Pres (kPa, mmHg, inHg, bar) Evap Canist Prg Duty (Evap Canister Purge Flow Duty, %) VVT Gap (Target Actual Position, °) IAC Throttle Opening (Idle Air Throttle Valve Opening, %) TP Sensor 1 Volt (TP Sensor (Main) Output Voltage, V) TP Sensor 2 Volt (TP Sensor (SUB) Output Voltage, V) APP Sensor 1 Volt (APP Sensor (Main) Output voltage, V) APP Sensor 2 Volt (APP Sensor (sub) Output Voltage, V) Accel Position (Absolute Accelerator Pedal Position, %) Throttle Position (Absolute Throttle Position, %) Target throttle Posi (Target throttle Valve Position, %) Throttle Motor Volt (Throttle Actuator Supply Voltage) (V) O2S B1 S2 (Ho2S, V) A/F B1 S1 Current (A/F Sensor Output Current, mA) Battery Voltage (V) Fuel Tank Level (%) A/C Pressure (A/C Refrigerant Absolute Pressure, kPa) Generator Cont Duty (Generator Control Duty, %) Generator Field Duty (Generator Field Coil Duty, %) Leak check P sensor (EVAP Leak check Pressure sensor, in.Hg, kPa) Radiator Fan Radiator Cooling Fan Control Relay, Low/High/Off) A/C Cond Fan (A/C Condenser Cooling Fan Control Relay, ON/OFF) A/C Comp Relay (A/C Compressor Relay, ON/OFF) Leak Check Pump (Mon) (EVAP Leak Detection Pump, ON/OFF) Fuel Pump (ON/OFF) Intake Tuning Sol (Com) (Intake Tuning Solenoid Command, ON/OFF) Throttle Motor Relay (ON/OFF) Starter SW (Starter Switch, ON/OFF) PSP Switch (Power Steering Pump Pressure Switch (Hydraulic P/S model) or Power Steering Switch (EPS model), ON/OFF) A/C Switch (ON/OFF) Blower Fan (ON/OFF) Brake Switch (ON/OFF) Electric Load (ON/OFF) PNP Signal (P/N or D range) (CVT model) Cruise RES/ACC Switch (ON/OFF) Cruise RES/Coast Switch (ON/OFF) Cruise CANCEL Switch (ON/OFF) Cruise ON/OFF Switch (Released/Pushed) Fuel Cut (ON/OFF) Closed Throttle Pos (Closed Throttle Position, ON/OFF) O2S B1 S2 ACT (HO2S, Active/Inactive) A/F B1 S1 ACT (A/F Sensor, Active/Inactive) Visual Inspection Engine Basic Inspection Engine Symptom Diagnosis MIL Does Not Come ON with Ignition Switch in ON Position and Engine Stopped (but Engine Can Be Started) MIL Remains ON after Engine Starts DTC P0010: "A" Camshaft Position Actuator Circuit/Open DTC P0011/P0012: "A" Camshaft Position-Timing Over-Advanced or System Performance/"A" Camshaft Position-Timing Over-Retarded DTC P0016: Crankshaft Position-Camshaft Position Correlation DTC P0031/P0032: HO2S Heater Control Circuit Low (Sensor 1)/HO2S Heater Control Circuit High (Sensor 1) DTC P0037/P0038/P0054: HO2S Heater Control Circuit Low (Sensor 2)/HO2S Heater Control Circuit High (Sensor 2)/HO2S Heater Resistance (Sensor2) DTC P0101: Mass or Volume Air Flow "A" Circuit Range/Performance DTC P0102/P0103: Mass or Volume Air Flow "A" Circuit Low/Mass or Volume Air Flow "A" Circuit High DTC P0111: Intake Air Temperature Sensor 1 Circuit Range Performance DTC P0112/P0113: Intake Air Temperature Sensor 1 Circuit Low/Intake Air Temperature Sensor 1 Circuit High DTC P0116/P0125/P0128: Engine Coolant Temperature Sensor 1 Circuit Range/Performance/Insufficient Coolant Temperature for Closed Loop Fuel Control/Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) DTC P0117/P0118: Engine Coolant Temperature Sensor 1 Circuit Low/Engine Coolant Temperature Sensor 1 Circuit High DTC P011B: Engine Coolant Temperature/Intake Air Temperature Correlation DTC P0122/P0123: Throttle/Pedal Position Sensor/Switch "A" Circuit Low/Throttle/Pedal Position Sensor/Switch "A" Circuit High DTC P0131/P0132/P0134/P2237: O2 Sensor Circuit Low Voltage (Sensor 1)/O2 Sensor Circuit High Voltage (Sensor 1)/O2 Sensor No Activity Detected (Sensor 1)/O2 Sensor Positive Current Control Circuit/Open DTC P0133: O2 Sensor Circuit Slow Response Sensor 1 DTC P0137/P0138: O2 Sensor Circuit Low Voltage (Sensor 2)/O2 Sensor Circuit High Voltage (Sensor 2) DTC P0139/P013E: O2 Sensor Circuit Slow Response (Sensor 2)/O2 Sensor Delayed Response Rich to Lean (Sensor 2) DTC P0171/P0172: System Too Lean/System Too Rich DTC P0222/P0223: Throttle/Pedal Position Sensor/Switch "B" Circuit Low/Throttle/Pedal Position Sensor/Switch "B" Circuit High DTC P0300/P0301/P0302/P0303/P0304: Random/Multiple Cylinder Misfire Detected/Cylinder 1 Misfire Detected/Cylinder 2 Misfire Detected/Cylinder 3 Misfire Detected/Cylinder 4 Misfire Detected DTC P0327/P0328: Knock Sensor 1 Circuit Low/Knock Sensor 1 Circuit High DTC P0335: Crankshaft Position Sensor "A" Circuit DTC P0340: Camshaft Position Sensor "A" Circuit DTC P0420: Catalyst System Efficiency Below Threshold DTC P0441: Evaporative Emission System Incorrect Purge Flow DTC P0443: Evaporative Emission System Purge Control Valve Circuit DTC P0449: Evaporative Emission System Vent Valve/Solenoid Circuit DTC P0456: Evaporative Emission System Leak Detected (Very Small Leak) DTC P0461: Fuel Level Sensor "A" Circuit Range/Performance DTC P0462/P0463: Fuel Level Sensor "A" Circuit Low/Fuel Level Sensor "A" Circuit High DTC P0480: Fan 1 Control Circuit DTC P0481: Fan 2 Control Circuit DTC P0482: Fan 3 Control Circuit DTC P0500: Vehicle Speed Sensor "A" DTC P0504: Brake Switch "A"/"B" Correlation DTC P0506/P0507: Idle Air Control System RPM Lower than Expected/Idle Air Control System RPM Higher than Expected DTC P050A/P050B: Cold Start Idle Air Control System Performance/Cold Start Ignition Timing Performance DTC P0532/P0533: A/C Refrigerant Pressure Sensor "A" Circuit Low/A/C Refrigerant Pressure Sensor "A" Circuit High DTC P0560: System Voltage DTC P0601/P0607/P062F/P2610: Internal Control Module Memory Check Sum Error/Control Module Performance/Internal Control Module EEPROM Error/ECM/PCM Internal Engine Off Timer Performance DTC P0602: Control Module Programming Error DTC P0616/P0617: Starter Relay Circuit Low/Starter Relay Circuit High DTC P0620: Generator Control Circuit DTC P0625/P0626: Generator Field/F Terminal Circuit Low/Generator Field/F Terminal Circuit High DTC P0630: VIN Not Programmed or Incompatible-ECM/PCM DTC P0660: Intake Manifold Tuning Valve Control Circuit/Open DTC P2096/P2097: Post Catalyst Fuel Trim System Too Lean/Post Catalyst Fuel Trim System Too Rich DTC P2101: Throttle Actuator "A" Control Motor Circuit Range/Performance DTC P2102/P2103: Throttle Actuator "A" Control Motor Circuit Low/Throttle Actuator "A" Control Motor Circuit High DTC P2111: Throttle Actuator Control System-Stuck Open DTC P2119: Throttle Actuator Control System - Stuck Open DTC P2122/P2123: Throttle/Pedal Position Sensor/Switch "D" Circuit Low/Throttle/Pedal Position Sensor/Switch "D" Circuit High DTC P2127/P2128: Throttle/Pedal Position Sensor/Switch "E" Circuit Low/Throttle/Pedal Position Sensor/Switch "E" Circuit High DTC P2135: Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correlation DTC P2138: Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation DTC P2195/P2196: O2 Sensor Signal Biased/Stuck Lean (Sensor 1)/O2 Sensor Signal Biased/Stuck Rich (Sensor 1) DTC P2227 (EVAP-Leak-Check Model): Barometric Pressure Sensor "A" Circuit/Range Performance DTC P2228/P2229 (EVAP-Leak-Check Model): Barometric Pressure Sensor "A" Circuit Low/Barometric Pressure Sensor "A" Circuit High DTC P2227/P2228/P2229 (Non-EVAP-Leak-Check Model): Barometric Pressure Sensor "A" Circuit Range/Performance/Barometric Pressure Sensor "A" Circuit Low/Barometric Pressure Sensor "A" Circuit High DTC P2400: Evaporative Emission System Leak Detection Pump Control Circuit/Open DTC P2404: Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance DTC P2A01: O2 Sensor Circuit Range/Performance (Sensor 2) DTC U0073: Control Module Communication Bus Off DTC U0101: ECM Lost Communication With TCM DTC U0121: ECM Lost Communication With ABS / ESP® Control Module DTC U0140: ECM Lost Communication With BCM DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module Troubleshooting for CAN-DTC Inspection of ECM and Its Circuits ECM Power and Ground Circuit Check Repair Instructions Special Tools and Equipment