Trouble Code Identification Charts

COROLLA CODE IDENTIFICATION

Code No.

System Affected

Probable Cause

12 & 13

RPM Signal

Distributor/Integrated Ignition Assembly Or Ckt, Starter Circuit, ECU

Ignition Signal

Ignitor Or Ckt To ECU, ECU

Oxygen Sens Signal

Oxygen Sens Or Ckt, ECU

Coolant Temp Sens Signal

Coolant Temp Sens Or Ckt, ECU

24 ⁽¹⁾

Intake Air Temp Sens Signal

Intake Air Temp Sens Or Ckt, ECU

Lean Air/Fuel Mixture

Loose Ground, Injector Or Ckt, Oxygen Sens Or Ckt, Fuel Pressure, Ignition Sys, Coolant Temp Sens, Vacuum Sens, ECU

Rich Air/Fuel Mixture

Loose Ground, Injector Or Ckt, Oxygen Sens Or Ckt, Fuel Pressure, Cold Start Injector Or Ckt, Coolant Temp Sens, Vacuum Sens, Compression Pressure, ECU

Vacuum Sens Signal

Vacuum Sens Or Ckt, ECU

41 ⁽¹⁾

Throttle Position Sens Signal

Throttle Position Sens Or Ckt, ECU

42 ⁽²⁾

Vehicle Speed Sens Signal

Vehicle Speed Sens Or Ckt, ECU

43 ⁽²⁾

Starter Signal

Starter Signal Ckt, Ignition Switch Or Ckt, ECU

51 ⁽²⁾

Switch Condition Signal

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

71 ⁽³⁾

EGR Sys Malfunction

EGR Sys, EGR Temp Sens Or Ckt, EGR-VSV, ECU

⁽¹⁾	CHECK ENGINE light comes on only for Calif. models.

⁽²⁾	CHECK ENGINE light will not come on when code is set.

⁽³⁾	Used only on Calif. models.