Powertrain, generic (extended)

P2427 EGR Cooling Valve Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2427 points to the high side: the control line of the EGR cooling valve is pulled towards battery voltage or the stage sees excessive current. VW's 2014 Touareg 3.0 TDI chart (CNRB) states the criterion as a current above 2.20 A, a sign of a short in the actuator winding or wiring to supply. Ford handles P2427 together with P2426 on its diesel engines within one permanently running short test of the cooler bypass actuator, 2 seconds to fail. To protect itself the driver stage usually switches off, so the flap remains wherever its spring holds it. Check the supply side of the harness and measure the coil resistance before replacing the valve; P2425 and P2426 are the open and low cases.

Likely causes

Control wire shorted to a supply voltage
Shorted turns in the actuator, drawing excess current
Water ingress in the valve connector

Symptoms

  • Check engine light
  • Flap remains in spring position, possibly slower warm-up

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

P2425P2426P245BP2457

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