DTC P0607 Control Module Performance: Description

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from the CPUs are different and deviate from the standards, the ECM will illuminate the MIL and set a DTC immediately.

The ECM also monitors the cruise control cancel circuit. If this circuit malfunctions, the ECM will set a DTC immediately (MIL is not illuminated).

DTC DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
P0607	ECM main CPU error ECM sub CPU error Cruise control cancel circuit malfunction (1-trip detection logic)	ECM

NOTE: First, check for exhaust gas leaks around the HO2S if P0606 is present. Exhaust gas leaks generate noise in the HO2S output. The ECM may interpret this as an HO2S transistor malfunction.