Code P2634 Possible Causes
Faulty Secondary Fuel Pump Relay
Secondary Fuel Pump Relay circuit poor electrical connection
Secondary Fuel Pump Relay harness is open or shorted
Engine Control Module ECM circuit poor electrical connection
Engine Control Module ECM harness is open or shorted
Engine Control Module ECM software update
Need help with this code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.