P2426 code meaning
EGR Cooling Valve Control Circuit Low
Powertrain system Generic code P24xx codes Check engine light
What P2426 means
P2426 is set when the command wire of the cooling valve reads too low, which on most driver stages means the wire is shorted to ground or the output cannot pull up. In Ford's Power Stroke summary the low and high faults are detected together by a short-circuit check of the cooler bypass actuator that runs all the time and fails after 2 seconds. Volkswagen instead applies a fixed limit to the CNRB 3.0 TDI of the 2014 Touareg: below 2.97 V on the signal the code is stored. Chafed insulation against the exhaust or the engine block is the usual cause. The bypass flap then stays in its default position, which can make the warm-up longer or the EGR gas hotter.
P2426 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 P2426
- Check engine light
- Bypass flap no longer moves
Common causes of P2426
- Most likelyControl wire chafed through and shorted to ground
- PossibleInternal short in the valve actuator
- Less likelyFaulty output stage in the engine control module
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 P2426 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). |
| 26 | The exact fault in that area. |
What to do next
- Note P2426 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 P2426
What does P2426 mean?
P2426 means "EGR Cooling Valve Control Circuit Low". P2426 is set when the command wire of the cooling valve reads too low, which on most driver stages means the wire is shorted to ground or the output cannot pull up. It is a generic code, so it means the same on every make.
Is it safe to drive with P2426?
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 P2426 fail an emissions test?
Yes, it can. P2426 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 P2426 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 P2426 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.