{"nhtsa_id":11018489,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-05-20","date":"2025-05-18","document_id":"18-025-25","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":"Powertrain Control Module","summary":"\"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P0629 - Fuel Pump Control Circuit High. ● P0171 - Fuel system Lean. ● P0087 - Fuel Rail Pressure Too Low – Bank 1. ● P16F0-00 - SPI Comm Hardware Fault. Customers may also experience one or more of the following: ● **Engine No Start.** ● The rear shafts can be damaged from pressing the accelerator while in gear with the Electronic Parking Brake (EPB) applied. ● Oxygen sensors can give wrong values entering EV mode. False fault detection is possible. ● The Instrument Panel Cluster (IPC) is unable to calculate the instantaneous fuel economy when under heavy acceleration. ● Variable Speed Fuel Pump doesn’t operate after refuel **This bulletin involves inspecting and possibly updating the PCM with the latest available software.**\"","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018489-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11018489-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11018489","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":["P0087","P0171","P0629","P16F0"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND CHEROKEE","year_from":2023,"year_to":2023,"match":"exact","vehicle_ids":["2023_jeep_grand-cherokee"]},{"make":"JEEP","model":"GRAND CHEROKEE 4XE","year_from":2023,"year_to":2023,"match":"base","vehicle_ids":["2023_jeep_grand-cherokee"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}