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

Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Ignition System, Coolant Temp. Sensor, Airflow Meter, ECU

Rich Air/Fuel Mixture

Airflow Meter, ECU, Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Cold Start Injector Or Circuit, Coolant Temp. Sensor

27 ⁽³⁾⁽⁴⁾

Sub-Oxygen Sensor Signal

Sub-Oxygen Sensor Or Circuit, ECU

Airflow Meter Signal

Airflow Meter Or Circuit, ECU

32 ⁽⁴⁾

Airflow Meter Signal

Airflow Meter Or Circuit, ECU

34 ⁽¹⁾

Turbocharger Pressure Sensor

Turbocharger Pressure Sensor Or Circuit, Turbocharger, ECU

35 ⁽¹⁾

High Altitude Compensator Sensor

ECU

41 ⁽²⁾

Throttle Position Sensor Signal

Throttle Position Sensor Or Circuit, ECU

42 ⁽⁵⁾

Vehicle Speed Sensor Signal

Vehicle Speed Sensor Or Circuit, ECU

43 ⁽⁵⁾

Starter Signal

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

51 ⁽⁵⁾

Switch Condition Signal

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

Knock Sensor Signal

Knock Sensor Or Circuit, ECU

Knock Sensor Control (ECU)

ECU

71 ⁽³⁾

EGR System Malfunction

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

⁽¹⁾	Used on 7M-GTE only.

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

⁽³⁾	Used on Calif. only.

⁽⁴⁾	Used on 7M-GE only.

⁽⁵⁾	CHECK ENGINE light will not come on when code is set.