P2451 Possible Causes
- Faulty evaporative emission system switching valve
- Evaporative emission system switching valve circuit open or shorted
- Poor electrical connection in evaporative emission system switching valve circuit
How to Fix Code P2451
Check the “Possible Causes” listed above. Visually inspect related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P2451 Symptoms
Possible symptoms
Illuminated engine light (or service engine soon warning light)
P2451 Meaning
The engine control module monitors the evaporative emission system switching valve. The OBDII code is set when the evaporative emission system switching valve is outside factory specifications.