P0476Exhaust Pressure Control Valve A Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The exhaust pressure control valve is a flap in the exhaust: on older Navistar/Ford diesels a warm-up flap that raises back pressure when cold, on Ram and others an exhaust brake, on VW's 2.0 TDI a flap that drives the low-pressure EGR, and on Audi and Bentley a sound flap. P0476 is the function check: the valve does not reach its target position or the expected back pressure. With the Navistar warm-up flap, the module controls to a target back pressure using the sensor as feedback, so missing pressure despite actuation is a function fault. The only code-specific reference is Ducati's Diavel V4 motorcycle (2023): faulty flap motor movement from a wrongly seated cable bracket, with warning lamp and torque limitation until ignition off.
- What you may notice
- Check engine light on
- Flap without function: sound unchanged, rattling
- Diesel: longer warm-up, exhaust brake weak or EGR faults
- Likely causes
- LikelyFlap stiff, coked or corroded
- PossibleLinkage, cable or bracket misadjusted
- PossibleActuator (motor, hydraulic or vacuum) weak
- PossibleExhaust pressure sensor or sensing tube giving wrong feedback
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.