P25DAFuel Level Sensor C Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P25DA is set when the third sender's signal climbs above the top of its valid range. On a resistor sender fed through a pull-up, that almost always means an open path: a broken wire, a disconnected plug, a burnt-out spot on the resistor track or a missing ground return. A short to a voltage source has the same effect. No manufacturer documents P25DA publicly. The sender A counterpart gives an idea of the limits used: Ford flags the high fault when resistance exceeds 200 ohms, corresponding to more than 253 A/D counts, for 30 s (P0463). CARB requires out-of-range monitoring for fuel level inputs. Unlike P25D9, the cause here is usually an interruption rather than a short, so connectors and the harness at the tank deserve the first look. The gauge will usually rest at one end.
- What you may notice
- Gauge stuck at one end of the scale
- Check engine lamp on
- Likely causes
- LikelyBroken signal or ground wire to sender C
- PossibleTank connector loose or unplugged after work on the tank
- PossibleInterrupted resistor track inside sender C
- RareSignal wire shorted to a voltage supply
- 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 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.