P0473Exhaust Pressure Sensor A Circuit High
- 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 sensor measures the pressure ahead of the turbine or in the manifold (Ford: turbine upstream pressure, Cummins: exhaust manifold pressure, older Ford diesels: EBP). The module uses it to calculate EGR flow, to control the variable turbine and engine braking, and to protect against overpressure. P0473 means the signal voltage is above its limit – Ford diesels above 4.8 V for 2 s, Ford petrol engines above 4.80 V for 5 s. Typical is an open signal wire that the pull-up drives high, an open sensor ground, or a short to 5 V or battery voltage.
- What you may notice
- Check engine light on
- EGR and turbo control on a substitute value, possibly reduced power
- Exhaust brake or warm-up flap without function
- Likely causes
- LikelySignal wire open or sensor ground open
- PossibleSignal shorted to 5 V or battery voltage
- PossibleSensor faulty internally
- PossibleConnector loose or corroded
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.