Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code

System Affected

Probable Cause

System Normal

O2 Sensor (Open)

Sensor or Circuit, ECM

O2 Sensor (Open) (1.6L DOHC Turbo)

Sensor or Circuit, ECM

O2 Sensor (Open) (1.6L SOHC)

Sensor or Circuit, ECM

14 ⁽¹⁾⁽²⁾

Coolant Temp. Sensor (1.6L Turbo)

Sensor or Circuit, ECM

14A ⁽¹⁾

Coolant Temp. Sensor (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

14B ⁽³⁾

Coolant Temp. Sensor (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

15 ⁽²⁾⁽³⁾

Coolant Temp. Sensor (1.6L Turbo)

Sensor or Circuit, ECM

21 ⁽²⁾

TPS Signal (High) (1.6L Turbo)

Sensor or Circuit, ECM

21A

TPS Signal (High) (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

21B

TPS Signal (Low) (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

22 ⁽²⁾

TPS Signal (Low) (1.6L Turbo)

Sensor or Circuit, ECM

23 ⁽²⁾⁽³⁾

MAT Sensor (1.6L Turbo)

Sensor or Circuit, ECM

23A ⁽³⁾

MAT Sensor (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

23B ⁽¹⁾

MAT Sensor (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

Vehicle Speed Sensor (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

Vehicle Speed Sensor (1.6L Turbo)

Sensor or Circuit, ECM

25 ⁽¹⁾⁽²⁾

MAT Sensor (1.6L Turbo)

Sensor or Circuit, ECM

31 ⁽²⁾

Turbo Overboost (1.6L Turbo)

Wastegate Actuator, Control Valve, Vacuum Hose, Air Filter, ECM

EGR Temp. Sensor (1.6L & 1.8L All Models)

EGR Valve, Sensor or Circuit, ECM

33 ⁽²⁾

MAP Sensor (High) (1.6L Turbo)

Sensor or Circuit, ECM

33A

MAP Sensor (High) (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

33B

MAP Sensor (Low) (1.6L & 1.8L Non Turbo)

Sensor or Circuit, ECM

34 ⁽²⁾

MAP Sensor (Low) (1.6L Turbo)

Sensor or Circuit, ECM

41 ⁽²⁾

Cam Signal (1.6L Turbo)

Sensor or Circuit, ECM

Elec. Spark Timing (1.6L & 1.8L Non Turbo)

Circuit, Ign. Module, ECM

43 ⁽²⁾

Elec. Spark Control (1.6L Turbo)

Knock Sensor or Circuit, MEM-CAL, ECM

O2 Sensor (Lean) (1.6L & 1.8L DOHC NON Turbo)

Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM

O2 Sensor (Lean) (1.6L DOHC Turbo)

Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM

O2 Sensor (Lean) (1.6L SOHC)

Injectors, Fuel Pressure, Exhaust Leaks, O2 Sensor or Circuit, ECM

O2 Sensor (Rich) (1.6L & 1.8L DOHC Non Turbo)

Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM

O2 Sensor (Rich) (1.6L DOHC Turbo)

Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM

O2 Sensor (Rich) (1.6L SOHC)

Injectors, Fuel Pressure, EGR, O2 Sensor or Circuit, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM

ECM/MEM-CAL Failure (1.6L Turbo)

ECM, EEPROM or MEM-CAL Failure

⁽¹⁾	High temperature indicated by temperature sensor.

⁽²⁾	Impulse turbocharged 1.6L only.

⁽³⁾	Low temperature indicated by temperature sensor.