Flash: Diagnostic and System Improvements
This bulletin
involves reprogramming the Powertrain Control Module (PCM) with thelatest available software.
The customer may experience a Malfunction Indicator Lamp (MIL) illumination
or notice the engine being too quick to shut down when coming to astop in Electric Stop Start (ESS) mode. Upon further investigation
the technician may find the following DTCs set in the PCM memory:P0556 - Brake
Booster Pressure Sensor Circuit Performance.
U0428 - Implausible
Data Received From Steering Angle Sensor Module.
U1504
- Implausible Message Data Length Received From Steering Angle Sensor.
C0501
- Left Front Wheel Speed Sensor Range/Performance.
C0507
- Right Front Wheel Speed Sensor Range/Performance.
C050D
- Left Rear Wheel Speed Sensor Range/Performance.
C0513
- Right Rear Wheel Speed Sensor Range/Performance.
Erroneously set Wheel Speed Sensor DTCs listed above
will not turn on the MIL by design but may be found during a vehiclediagnostic scan.Some customers may also experience the
following condition:During
an engine limp mode condition, the transmission remains in a fixedgear.
In addition the following enhancements are included:Calibration
update to allow the throttle body to be cycled while the engine isoff, for diagnostic purposes.
Calibration
update for ESS to allow the engine to remain running during a briefstop.
