The EGR cooler bypass valve control circuit is reading low, so exhaust gas is not being routed through the cooler correctly.
P2425 — also written P2425, P 2425, 2425 — is the OBD-II code for egr cooling valve control circuit low. Same code, same fix: this page covers every spelling of it.
P2425 is a emissions fault code, typically costing £120–£700 to put right in a UK garage.
What causes P2425?
- Failed bypass valve actuator
- Carbon seizing the flap
- Wiring or vacuum control fault
- Corroded connector
How P2425 is fixed
- Test the actuator and its control signal
- Free or replace the bypass valve
- Repair vacuum lines where used
P2425 repair cost in the UK
Most P2425 repairs land between £120–£700 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P2425?
Drivable, though emissions and DPF loading suffer.
Urgency: medium.