Jeep Grand Wagoneer 2023 — technical service bulletin
Bulletin 1804023 · NHTSA communication 10236899 · issued Apr 1, 2023
Technical service bulletin
communication type
Electrical System
component
2023
model years
2
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: ? P05CC-00 - Cold Start A Camshaft Position Timing Performance Bank 1. Customer may also experience the following: ? Poor or insufficient A/C performance during towing or other high torque maneuvers. ? Belt chirp is heard at startup or when A/C cycles on. This bulletin involves reprogramming the PCM with the latest available software.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.