P2425EGR Cooling Valve Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- The EGR cooling valve, often a bypass flap, decides whether recirculated gas passes through the cooler or around it, for example to warm up faster. P2425 reports that the driver stage sees no load on the control line, typically an open wire, a loose connector or a burnt-out actuator. Ford uses P2425 to P2427 for the EGR cooler bypass valve of its Power Stroke diesels: the open-load check runs continuously and needs 2 seconds to fail (2023 summary). VW's 2014 Touareg chart for the 3.0 TDI (CNRB) sets P2425 when the signal voltage falls below 4.70 V. P2426 and P2427 cover shorts. With the flap stuck, the engine may warm up slowly or EGR cooling may be lost.
- What you may notice
- Check engine light
- Slow warm-up or higher NOx depending on flap position
- Likely causes
- LikelyBroken wire in the control circuit near the hot exhaust side
- PossibleLoose or corroded connector at the valve
- PossibleOpen coil or motor inside the valve actuator
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.