P2427 code meaning
EGR Cooling Valve Control Circuit High
Powertrain system Generic code P24xx codes Check engine light
What P2427 means
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.
P2427 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2427
- Check engine light
- Flap remains in spring position, possibly slower warm-up
Common causes of P2427
- Most likelyControl wire shorted to a supply voltage
- PossibleShorted turns in the actuator, drawing excess current
- Less likelyWater ingress in the valve connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR cooling valve
What each part of P2427 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 27 | The exact fault in that area. |
What to do next
- Note P2427 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2427
What does P2427 mean?
P2427 means "EGR Cooling Valve Control Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2427?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2427 fail an emissions test?
Yes, it can. P2427 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2427 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2427 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.