Circuit/System Verification
- Ignition ON, observe the DTC information with a scan tool. Verify DTC P0651 is not set.
- If DTC P0651 is set, refer to DTC P0641 or P0651 .
- Turn all accessories OFF.
- Engine idling, observe the MAP Sensor parameter. The reading should be between 32-48 kPa.
- If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.
IMPORTANT:
In extreme cold weather conditions ice may form in the vacuum source to the MAP sensor and may set a DTC. Inspect the MAP sensor and the vacuum source for ice, moisture, or other restrictions.