P26C6 code meaning
Exhaust Flow Control Valve A Control Circuit Low
Powertrain system Generic code P26xx codes Check engine light
What P26C6 means
P26C6 reports that the drive circuit of exhaust valve A sits at too low a voltage – typically because the wiring or the actuator has shorted to ground. Ford's 2024 OBD summary shows that the PCM handles it as failure type 11 of the valve A circuit check, which runs continuously and needs about five seconds; the gasoline summaries 2020–2024 carry a typo here and print P25C6 instead of P26C6 in the threshold table. Deutz lists the same code for its MD1 engines as a low voltage or short on the exhaust flap. Ford bulletin 22-2153 for the Mustang names P26C6 alongside other flap codes and a lit MIL, caused by an exhaust that was not seated correctly. With the circuit pulled low the flap can no longer be commanded; the sister codes P26C5 (open) and P26C7 (high) separate the other fault patterns.
P26C6 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P26C6
- Check engine lamp on
- Exhaust mode cannot be changed
- Flap stuck in one position, exhaust permanently quiet or loud
Common causes of P26C6
- Most likelyControl wire chafed through against the body or exhaust and shorted to ground
- PossibleInternal short in the flap actuator
- Less likelyWater or road salt in the actuator connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Exhaust flow valve aActuatorWiring harness
What each part of P26C6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| C6 | The exact fault in that area. |
What to do next
- Note P26C6 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 P26C6
What does P26C6 mean?
P26C6 means "Exhaust Flow Control Valve A Control Circuit Low". P26C6 reports that the drive circuit of exhaust valve A sits at too low a voltage – typically because the wiring or the actuator has shorted to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P26C6?
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 P26C6 fail an emissions test?
Yes, it can. P26C6 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 P26C6 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P26C6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.