P2636 Possible Causes
- Faulty fuel pump relay
- Defective fuel pump
- Fuel pump wiring harness is open or shorted
- Poor electrical connection in the fuel pump circuit
- Faulty fuel pump control module (if applicable)
How to Fix Code P2636
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P2636 Meaning
The Engine Control Module (ECM) monitors the fuel pump control circuit. The ECM sets the OBDII code when the fuel pump control circuit is outside factory specifications.