Code Identification

CODE IDENTIFICATION

Code No.

System Affected

Probable Cause

12 & 13

RPM Signal

Distributor Or Circuit, Starter Circuit, ECU

Ignition Signal

Ignitor Or Circuit To ECU, ECU

Oxygen Sensor Signal

Oxygen Sensor Or Circuit, ⁽¹⁾ Oxygen Sensor Heater, ECU

Coolant Temp. Sensor Signal

Coolant Temp. Sensor Or Circuit, ECU

24 ⁽²⁾

Intake Air Temp. Sensor Signal

Intake Air Temp. Sensor Or Circuit, ECU

Lean Air/Fuel Mixture

ECU, Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Ignition System, Coolant Temp. Sensor, ⁽³⁾ Airflow Meter/Vacuum Sensor

Rich Air/Fuel Mixture

Fuel Pressure, ⁽³⁾ Airflow Meter/Vacuum Sensor, ECU, Injector Or Circuit, Oxygen Sensor Or Circuit, Cold Start Injector Or Circuit, Coolant Temp. Sensor

27 ⁽⁴⁾⁽⁵⁾

Sub-Oxygen Sensor Signal

Sub-Oxygen Sensor Or Circuit, ECU

31 (1.6L, 2.2L)

Vacuum Sensor Signal

Vacuum Sensor Or Circuit, ECU

31 (2.0L)

Airflow Meter Signal

Airflow Meter Or Circuit, ECU

32 ⁽⁶⁾

Airflow Meter Signal

Airflow Meter Or Circuit, ECU

34 ⁽⁶⁾

Turbocharger Pressure Sensor

Turbocharger Pressure Sensor Or Circuit, ECU

35 ⁽⁶⁾⁽⁷⁾

Turbocharger Pressure Sensor

Turbocharger Pressure Sensor Or Circuit, ECU

41 (1.6L) ⁽²⁾

Throttle Position Sensor Signal

Throttle Position Sensor Or Circuit, ECU

41 (2.0L) ⁽²⁾

Throttle Position Sensor Signal

Throttle Position Sensor Or Circuit, ECU

41 (2.2L) ⁽²⁾

Throttle Position Sensor Signal

Throttle Position Sensor Or Circuit, ECU

42 ⁽⁷⁾

Vehicle Speed Sensor Signal

Vehicle Speed Sensor Or Circuit, ECU

43 ⁽⁷⁾

Starter Signal

Starter Signal Circuit, Ignition Switch Or Circuit, Main Relay, ECU

51 ⁽⁷⁾

Switch Condition Signal

A/C Switch Circuit, ECU, Neutral/Start Switch Or Circuit, TPS Or Circuit

52 ⁽⁶⁾

Knock Sensor Signal

Knock Sensor Or Circuit, ECU

53 ⁽⁶⁾

Knock Sensor Control (ECU)

ECU

71 ⁽⁸⁾

EGR System Malfunction

EGR System, EGR Temp. Sensor Or Circuit, ECU, EGR VSV

⁽¹⁾	Used on 3S-GTE and 4A-FE only.

⁽²⁾	CHECK ENGINE light comes on when code sets (Calif. only).

⁽³⁾	Airflow meter used on 3S-GTE and vacuum sensor on all others.

⁽⁴⁾	Used on 5S-FE only.

⁽⁵⁾	Used on Calif. only.

⁽⁶⁾	Used on 3S-GTE only.

⁽⁷⁾	CHECK ENGINE light will not come on when code is set.

⁽⁸⁾	Used on 3S-GTE and Calif. only on 4A-FE and 5S-FE.