Trouble Code Identification Charts

SUPRA CODE IDENTIFICATION

Code No.

System Affected

Probable Cause

12 & 13

RPM Signal

Distributor Or Ckt, Starter Ckt, ECU

Ignition Signal

Ignitor Or Ckt To ECU, ECU

O2 Sensor Signal

O2 Sensor Or Ckt, ⁽¹⁾ O2 Sensor Heater, ECU

CT Sensor Signal

Coolant Temp. Sensor Or Ckt, ECU

24 ⁽²⁾

IAT Sensor Signal

Intake Air Temp. Sensor Or Ckt, ECU

Lean Air/Fuel Mixture

Loose Ground, Injector Or Ckt, O2 Sensor Or Ckt, Fuel Pressure, Ign. Sys, Coolant Temp. Sensor, Airflow Meter, ECU

Rich Air/Fuel Mixture

Loose Ground, Injector Or Ckt, O2 Sensor Or Ckt, Fuel Pressure, Cold Start Injector Or Ckt, Coolant Temp. Sensor, Airflow Meter, Compression Pressure, ECU

27 ⁽³⁾⁽⁴⁾

Sub-O2 Sensor Signal

Sub-O2 Sensor Or Ckt, ECU

Airflow Meter Signal

Airflow Meter Or Ckt, ECU

32 ⁽⁴⁾

Airflow Meter Signal

Airflow Meter Or Ckt, ECU

34 ⁽¹⁾

Turbocharger Pressure Sensor

Turbocharger Pressure Sensor Or Ckt, Turbocharger, ECU

35 ⁽¹⁾

High Altitude Compensator Sensor

ECU

41 ⁽²⁾

TP Sensor Signal

Throttle Position Sensor Or Ckt, ECU

42 ⁽⁵⁾

VSS Signal

Vehicle Speed Sensor Or Ckt, ECU

43 ⁽⁵⁾

Starter Signal

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

51 ⁽⁵⁾

Switch Condition

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

Knock Sensor Signal

Knock Sensor Or Ckt, ECU

Knock Sensor Ctrl (ECU)

ECU

71 ⁽³⁾

EGR System Malfunction

EGR Sys, EGR Temp. Sensor Or Ckt, EGR-VSV, ECU

⁽¹⁾	Used only on 7M-GTE.

⁽²⁾	CHECK ENGINE light comes on only for Calif. models.

⁽³⁾	Used only on Calif. models.

⁽⁴⁾	Used only on 7M-GE.

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