NHTSA Complaint #11571045 — 2010 BUICK LUCERNE

The contact owns a 2010 Buick Lucerne. The contact stated while driving 75 MPH, the vehicle went into LIMP Mode and the engine shut off inadvertently. The contact was able to veer to the side of the road. The vehicle restarted independently after 10-15 minutes. The messages "Reduced Engine Power", "Starting Disabled", "Service Throttle", "Service Stabili-trak Soon" were displayed, and other unknown warning lights were illuminated. The contact was able to continue driving; however, the vehicle failed to exceed 20-30 MPH. The vehicle was taken to the dealer on two occasions, and the dealer retrieved diagnostic test codes: P2138 and P2122. The dealer replaced the throttle body and the accelerator pedal; however, the failure persisted. The contact stated that the failure mainly recurred while making left turns. The manufacturer was notified of the failure and informed the contact that they could only assist after the vehicle had been taken to the dealer. The dealer was contacted and informed the contact that the failure had to happen while driving in the presence of a mechanic, then the vehicle could be diagnosed. The vehicle was not diagnosed or repaired. The failure mileage was approximately 61,798.