P0606

DTC P0606

Circuit Description
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM).

Condition for Running the DTC
- The ECM detects that the ECM internal CPU malfunction is detected or ECM flash ROM data malfunction is detected.

Action Taken When the DTC Sets
- The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
- The ECM limits fuel rail pressure within 11600 psi (80 MPa).
- The ECM limits accelerator control range to idle.
- The ECM closes the EGR valve and holds to close position.
- The ECM inhibits the cruise control.
- The ECM inhibits the PTO control.

Condition for Clearing the DTC
- A current DTC clears when the ignition is turned OFF.
- Clear the MIL and the DTC with a scan tool.

Test Description
The numbers below refers to the step number on the diagnostic table.
3. If the ground circuit(s) are not connected properly, this DTC may set.

DTC P0606

Schematic Reference: Engine Controls Schematics