Circuit/System Verification
- Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0651 is not set.
- If P0651 is set, refer to DTC P0641 or P0651 .
- Turn all accessories OFF.
- Engine running, observe the scan tool MAP Sensor parameter. The reading should be between 32-48 kPa.
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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.