Circuit/System Verification

If DTCs P0641 or P0651 are set.
- If any of the DTCs are set, refer to DTC P0641 or P0651 .
Verify that restrictions do not exist in the exhaust system. Refer to Restricted Exhaust .
Engine running, observe the scan tool MAF Sensor parameter. The reading should be between 2,000-3,800 Hz depending on the ECT.
A wide open throttle (WOT) acceleration from a stop should cause the MAF Sensor parameter on the scan tool to increase rapidly. This increase should be from 2-6 g/s at idle to greater than 180 g/s at the time of the 1-2 shift.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.