JEEP

1806620

2020-08-25 · NHTSA 10221885

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one of the following DTCs have been set:P1D83 - Implausible Engine Oil Temperature Signal Received. 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 vehicle diagnostic scan.Some customers may also experience the following:The engine being too quick to shut down when coming to a stop in Engine Stop/Start (ESS) mode. During an engine limp mode condition, the transmission remains in a fixed gear. In addition, the following software enhancements are available: Calibration update to allow the throttle body to be cycled while the engine is off, for diagnostic purposes. Calibration update for ESS to allow the engine to remain running during a brief stop.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.