Trouble Code Identification

TROUBLE CODE IDENTIFICATION

Code

System Affected

⁽¹⁾ Normal Mode

⁽¹⁾ Test Mode

Probable Cause

RPM Signal

N/A

Distributor, Starter Or Circuit, ECM

RPM Signal

Distributor Or Circuit, ECM

Ignition Signal

N/A

Ignitor Or Circuit To ECM, ECM

⁽²⁾ No 1 Oxygen Sensor Signal

No. 1 Oxygen Sensor/ Heater Or Circuit, ECM

Engine Coolant Temperature Signal

Engine Coolant Temp Sensor Or Circuit, ECM

Intake Air Temperature Sensor Signal

Intake Air Temp Sensor Or Circuit, ECM

Lean Air/Fuel Mixture

Loose Ground, Injector Or Circuit, Oxygen Sensor/Heater Or Circuit, Fuel Pressure, Ignition, Airflow Meter PAIR System. ECM

Rich Air/Fuel Mixture

Loose Ground, Injector Or Circuit, Fuel Pressure, Engine Coolant Temp Sensor, Airflow Meter Compression, ECM

⁽³⁾ No 2 Oxygen Sensor Signal

No 2 Oxygen Sensor/ Heater Or Circuit, ECM

Airflow Meter Signal Circuit

Airflow Meter Or Circuit, ECM

Airflow Meter Signal Circuit

Airflow Meter Or Circuit, ECM

BARO Sensor

ECM

TP Sensor Signal

Throttle Position Sensor Or Circuit, ECM

Vehicle Speed Sensor Signal

OFF

Vehicle Speed Sensor Or Circuit, ECM

Starter Signal

N/A

OFF

Starter Signal Circuit, Ignition Switch Or Circuit, ECM

Switch Condition Signal

N/A

OFF

A/C Switch Circuit, Park/Neutral Switch Or Circuit, TPS Or Circuit, ECM

⁽⁴⁾ Front Knock Sensor Signal

N/A

Front Knock Sensor Or Circuit, ECM

Knock Control Signal

N/A

ECM

⁽⁵⁾ Rear Knock Sensor Signal

N/A

Rear Knock Sensor Or Circuit, ECM

EGR System Malfunction

EGR System, EGR Temp Sensor Or Circuit, EGR-VSV, ECM

Transmission Control Module Communication

N/A

ECT1 Circuit

Transmission Control Module Communication

N/A

ESA1 Circuit

Transmission Control Module Communication

N/A

ESA2 Circuit

Transmission Control Module Communication

N/A

ESA3 Circuit

⁽¹⁾	ON indicates MIL on instrument panel will be illuminated. N/A indicates item is not included in malfunction diagnosis when using this mode. OFF indicates MIL on instrument panel will not be illuminated even if malfunction is detected.

⁽²⁾	The No. 1 oxygen sensor is located on exhaust pipe closest to outside of vehicle on passenger's side.

⁽³⁾	The No. 2 oxygen sensor is located on exhaust pipe closest to outside of vehicle on driver's side.

⁽⁴⁾	Front knock sensor may be referred to as No. 1 knock sensor.

⁽⁵⁾	Rear knock sensor may be referred to as No. 2 knock sensor.