U18A2 fault code: what 10 owners reported

Fuel pump control module.Crank no start. Service engine soon light. U18A2 code sent to Onstar. Inspected and confirmed by dealer. Vehicle is currently sitting at dealer that I purchased it from and out of service until repaired.

Car stalled and told me to put in neutral. Could smell gas. Car wouldn't come back on. Code u18a2 (lost communication with fuel pump communication module), part is available for inspection, we were all at risk due to the car stalling on the highway with no prior warnings, check engine light came on after car stalled, ordered new part from GMC, fix the issue right away. This part has been recalled on other models just not on 2022.

…U0137 Trailer Brake Control Module P1050 Reductant Level Sensor P11DB NOX SENOR 1 U0076 CONTROL MODULE COMMUNICATION POWERTRAIN SENSOR U101E LOST COMMUNICATIONS WITH DEDUCTANT CONTROL MODULE U029D LOST COMMUNICATIONS WITH NOX SENSOR 1 U029E LOST COMMUNICATIONS WITH NOX SENSOR 2 U02A3 LOST COMMUNICTIONS WITH PARTICULATE MATTER SENSOR U18A2 LOST COMMUNICATIONS WITH FUEL PUMP P203C REDUCTANT LEVEL SENSOR CIRCUIT LOW P204C REDUCTANT PRESSURE SENSOR CIRCUIT LOW U029E LOST COMMUNICATION WITH NOX SENSOR 2 P20B9 REDUCTANT HEATER 1 CONTROL CIRCUIT OPEN P0307 CYLENDER 7 MISFIRE P1488 TP MOTOR CONTROL CIRCUIT P0097 INSTAKE AIR TEMPORATURE (IAT) SENSOR 2 Upon having an advanced system scan there was an…

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while his wife was attempting to start the vehicle, the engine failed to turn over as intended. No warning light was illuminated. Upon further inspection, the contact stated that there was an abnormal sound coming from the vehicle. The contact used an OBD-2 diagnostic scanner and retrieved DTC: P129F and U18A2. The vehicle was towed to a local dealer, where it remained for further investigation. The contact related the failure to an unknown recall; however, the VIN was not under recall. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The…

WHILE DRIVING IN MY SON TO SCHOOL MY CHECK ENGINE LIGHT TURNED ON. FEARING MY CAR WOULD DIE WITH NO WARNING (LIKE HAD PREVIOUSLY OCCURRED) I WENT BACK TO MY HOUSE. I USED ONSTAR TO PULL THE ENGINE CODE OF U18A2 WHICH AFTER RESEARCHING ONLINE COULD RESULT IN 'LOSS OF PROPULSION' LIKE PREVIOUSLY OCCURRED. I CALLED THE DEALER AND HAD THE CAR TOWED FOR SERVICE. AFTER 15 DAYS I RECEIVED MY CAR BACK AND WAS TOLD IT WAS A LOOSE ELECTRICAL CONNECTOR SOMEWHERE.

…Bought the hyper-tough code reader delivered by Walmart and it delivered professional grade results: U18A2, P1787 and P187E. I am beyond pissed. I could have died due to your intentional negligence in manufacturing. I have a car that will not start, with payments. I have searched the internet and found your “save ourselves plan” and let’s do a voluntary recall starting with 2021 on the same failed parts I am dealing with at the moment. Thanks GMC, who is the ringleader of your circus?

One morning, in an attempt to start my car, it would not start. Instead, it lit up the check engine light. The engine was turning over and attempting to start, but would not start. I know someone with a code reader device that I asked to come hook up to my car and read what code was causing my check engine light to pop up. The reader displayed the code U18A2 which indicates a "Lost Communication with Fuel Pump Control Module (FPCM)". This commonly causes a no-start or stalling condition due to a broken CAN bus wire, corroded harness, or faulty FPCM ground. Key fixes involve repairing wiring along the frame rail. Many versions of the 2020 equinox have already been recalled for a fuel pump…

Fuel leaking from fuel tank and receiving code u18a2 lost communication with fuel pump driver control module.

VEHICLE LOST ALL POWER WHILE PULLING INTO A 4 WAY MAIN ROAD. VEHICLE EMERGENCY LIGHTS/FLASHERS DID NOT WORK. COMPLETE ELECTRICAL FAILURE. CAR WAS STALLED IN ACTIVE TRAFFIC LANE DURING NIGHT TIME HOURS. VEHICLE WAS TOWED INTO DEALER FOR FULL DIAGNOSTIC REVIEW- NO ISSUE WAS FOUND WITH VEHICLE, ALTHOUGH SEVERAL EEC TEST CODES WERE DETECTED- P0627, P0629, P01400, U18A2, U1524 AND U18B4+71- MOST CODES HAVING TO DO WITH FUEL PUMP/EMISSION ISSUES. OWNER OF VEHICLE CONSIDERS THIS A SERIOUS ISSUE AS CAR STALLED AT NIGHT, IN A HEAVY TRAFFIC AREA WITH NO LIGHTING OR EMERGENCY FLASHERS WORKING TO PROVIDE PROTECTION FROM ON-COMING TRAFFIC. EMERGENCY PERSONNEL WERE CALLED TO ASSIST.

The contact owns a 2020 Chevrolet Equinox. The contact stated that while driving at approximately 35 MPH, the vehicle stalled. The vehicle could not able to be restarted. The vehicle was towed to the residence, and a handheld diagnostic machine retrieved DTC: U18A2. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 12,000.