Powertrain, generic (extended)

P2425 EGR Cooling Valve Control Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Broken wire in the control circuit near the hot exhaust side
Loose or corroded connector at the valve
Open coil or motor inside the valve actuator

Symptoms

  • Check engine light
  • Slow warm-up or higher NOx depending on flap position

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–500
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

egr cooling valve

Related codes

P2426P2427P245AP245BP2457

References: fordservicecontent.com, static.nhtsa.gov, performanceparts.ford.com.