Fuel Gauge Is Inaccurate Or Slow To Change - keywords calibration cluster inoperative intermittent IPC level sensor update

This PI was superseded to update Recommendation/Instructions. Please discard PIT4269.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

The fuel gauge is inaccurate or slow to respond to changes in the fuel level. An example concern: The fuel tank has 1/2 a tank of gas. If the vehicle is parked on an incline with the front of the vehicle pointing up, the fuel gauge may display about a 1/4 tank when the vehicle is started. When the vehicle is driven on a flat surface, the fuel gauge does not change or takes a long time to update. This is due to the fuel gauge buffering. The current software may take up to 9 minutes for the fuel gauge to update. If the ignition is turned off and then back on, the fuel gauge will update to the current fuel level.

There is a revised calibration for the ECM to correct this concern. It will be necessary to reprogram the ECM and TCM at the same time using TIS2WEB. To update both modules select Programming Sequence ECM/TCM on the Supported Controller Screen.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.