{"nhtsa_id":11038540,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-10-16","date":"2026-10-10","document_id":"18-083-26","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P2237-00 - O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1. ● P2240-00 - O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. ● P2251-00 - O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1. ● P2254-00 - O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1. ● P2243-00 - O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1. ● P2247-00 - O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1. ● P015B-00 - O2 Sensor Delayed Response - Lean To Rich Bank 1 Sensor 1. ● P015D-00 - O2 Sensor Delayed Response - Lean To Rich Bank 2 Sensor 1. ● P2AF6-00 - Starter Relay 3 Stuck Off. ● P0E7C-00 - Coolant Bypass Valve \"B\" Control Circuit Low. ● P0E7D-00 - Coolant Bypass Valve \"B\" Control Circuit High. ● P0E7E-00 - Coolant Bypass Valve \"B\" Control Circuit Range/Performance. ● P0E7F-00 - Coolant Bypass Valve \"B\" Control Circuit Stuck/Open. ● U063C-00 - Lost Communication With Coolant Bypass Valve Actuator \"B\". ● P0100-00 - Mass Or Volume Air Flow Sensor \"A\" Circuit. ● P0101-00 - Mass Or Volume Air Flow Sensor \"A\" Circuit Range/Performance. ● P0461-00 - Fuel Level Sensor \"A\" Circuit Range/performance. ● P0073-00 - Ambient Air Temperature Sensor Circuit \"A\" High. ● P0072-00 - Ambient Air Temperature Sensor Circuit \"A\" Low. ● P062B-00 - Internal Control Module Fuel Injector Control Performance. ● B1810-00 - Driver Door Shorted Low. ● B25C7-00 - Redundant Driver Door Shorted Low.** ● U0673-00 - Lost Communication With Ion Sense Module (in active or stored status). ● P00C6-00 - Fuel Rail Pressure Too Low - Engine Cranking (in active or stored status). ● P2C90-00 - Crankcase Ventilation System - Hose \"A\" Disconnected (in active or stored status). This bulletin involves inspecting and possibly reprogramming the PCM with the latest available software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038540-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11038540-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11038540","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["B1810","B25C7","P0072","P0073","P00C6","P0100","P0101","P015B","P015D","P0461","P062B","P0E7C","P0E7D","P0E7E","P0E7F","P2237","P2240","P2243","P2247","P2251","P2254","P2AF6","P2C90","U063C","U0673"],"topics":[],"vehicles":[{"make":"JEEP","model":"GRAND WAGONEER","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_jeep_grand-wagoneer"]},{"make":"JEEP","model":"WAGONEER","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_jeep_wagoneer"]}],"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":[]}