P1258

DTC P1258

Steps 1-2:

Circuit Description
The PCM uses the ECT sensor to monitor the engine for an over temperature condition. This condition occurs when the coolant temperature is above 132 degrees C (270 degrees F). When an over temperature condition is present, DTC P1258 will set. The PCM will alternately disable 4 injectors. By alternately disabling 4 injectors, the PCM is able to reduce the temperature of the coolant.

Conditions for Running the DTC
^ DTC's P0117, P0118, P1114, and P1115 are not active.
^ The engine is running.

Conditions for Setting the DTC
^ The engine coolant temperature is above 132°C (270°F).
^ The condition is present for more than 10 seconds.

Action Taken When the DTC Sets
^ The PCM will illuminate the malfunction indicator Lamp (MIL) during the first trip in which the diagnostic test has been run and failed.
^ The PCM will signal the IPC to turn ON the Service Engine Soon indicator.
^ The PCM will alternately disable two groups of four cylinders by turning OFF the fuel injectors.
^ The PCM will store conditions which were present when the DTC set as Freeze Frame and File Records data.

Conditions for Clearing the MIL/DTC
^ The PCM will turn the MIL OFF after three consecutive trips that the diagnostic has been run and passed.
^ The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using the scan tool Clear DTC Information function.