P26FE concerns the electrically driven exhaust flap A on models with selectable exhaust sound. The circuit is fine, but the flap does not reach the commanded position. Ford's OBD summaries 2020–2024 assign it to bank 1 and use two checks: the flap's smart driver reports a stuck valve over its PWM line, and a rationality test compares measured with commanded position, with a duration that depends on ambient conditions. Ford bulletins 17-2063 and 17-2217 (Focus RS 2016–2017) trace it to a valve freezing below 0 °C and fix it with new PCM software; 23-2132 (Mustang 2018–2023) blames a badly seated exhaust; 25-2144 (F-150 5.2 L, 2023–2025) requires PCM update and actuator alignment. Drivers see a lit MIL and a message that exhaust or drive mode is unavailable; bank 2 uses P2BFB.
Medium severity. Can I keep driving?You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.
Symptoms
- Check engine light on
- Message that exhaust or drive mode is not available
- No audible change in exhaust sound between modes
Most likely causes
- Flap sticking from corrosion, soot or freezing moisture
- Exhaust or actuator bracket not seated correctly
- Actuator not aligned after replacement or outdated PCM software
- Worn or failed flap actuator
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P26FE means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 6: Control modules and outputs
- FE: Specific fault in that system
Frequently asked questions
Can I keep driving with code P26FE?
You can usually keep driving in the short term. If you smell exhaust fumes in the cabin, stop driving and ventilate the car.
What causes code P26FE?
The most common causes are: flap sticking from corrosion, soot or freezing moisture; exhaust or actuator bracket not seated correctly; actuator not aligned after replacement or outdated PCM software.
Related codes
- P26C5Exhaust Flow Control Valve A Control Circuit/Open
- P26C6Exhaust Flow Control Valve A Control Circuit Low
- P26C7Exhaust Flow Control Valve A Control Circuit High
- P2BFBExhaust Flow Control Valve B Control Performance
Sources
- fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
- fordservicecontent.com: OBD Operations Summary Gasoline 2020 2023
- static.nhtsa.gov: MC 10125071 9999
- static.nhtsa.gov: MC 10236033 0001
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.