For 1990-2009 cars

### Emissions Related DTCs

#### Action Taken When the DTC Sets - Type A

The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.

#### Action Taken When the DTC Sets - Type B

The control module illuminates the MIL on the second consecutive ignition cycle that the diagnostic runs and fails.

#### Conditions for Clearing the MIL/DTC - Type A or Type B

• | The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

• | A current DTC Last Test Failed clears when the diagnostic runs and passes.

• | Use a scan tool in order to clear the MIL and the DTC.

### Non-Emissions Related DTCs

#### Action Taken When the DTC Sets - Type C

• | The control module stores the DTC information into memory when the diagnostic runs and fails.

• | The MIL will not illuminate.

• | The driver information center, if equipped, may display a message.

#### Conditions for Clearing the DTC - Type C

• | A last test failed, or current DTC, clears when the diagnostic runs and passes.

• | Use a scan tool in order to clear the DTC.

#### Conditions for Clearing the DTC - Type X

This DTC is available in the PCM software, but has been disabled, or turned OFF. In this case, the diagnostic does not run, no DTCs are stored, and the MIL does not illuminate. Type X DTCs are used primarily for export vehicles that do not require MIL illumination or DTC storing.