CADILLAC · 2018-09-18
18199 - Service Update - Software that controls the electric motor for the auxiliary transmission fluid pump has a fault in the logic used for restarting the pump. During a pump restart attempt, motor current over threshold can occur resulting in DTC P0C28 (Auxiliary Transmission Fluid Pump High Current). Additionally, DTC P0B07 (Auxiliary Transmission Fluid Pump Motor Phase W Low Current) was incorrectly calibrated off. A Phase W Low Current fault will result in a vehicle shutdown or no-start condition with no DTC stored and no MIL illuminated.