OBD-II code · Powertrain (generic, extended)
P26C4 Internal Control Module Clutch Pedal Performance
The internal clutch pedal interpretation logic in the control module does not match the external clutch switch state. Manual transmission start interlock or stop-start enable can misbehave.
Is it safe to drive with P26C4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- PossibleExternal clutch switch drift
- PossibleSignal corruption between switch and ECU
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Module, Clutch Switch
Related codes
- P26C1Engine Coolant Bypass Valve D Range/Performance
- P26C2Engine Coolant Bypass Valve D Stuck Closed
- P26C3Internal Control Module Transmission Range Sensor Performance
- P26C5Exhaust Flow Control Valve A Control Circuit / Open
- P26C6Exhaust Flow Control Valve A Control Circuit Low
- P26C7Exhaust Flow Control Valve A Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.