Powertrain, generic (extended)

P25DA Fuel Level Sensor C Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

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.

Likely causes

Broken signal or ground wire to sender C

Tank connector loose or unplugged after work on the tank

Interrupted resistor track inside sender C

Signal wire shorted to a voltage supply

Symptoms

Gauge stuck at one end of the scale
Check engine lamp on

Repair estimate

DifficultyMediumDIY possible

Parts and labour€50–600

Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel level sensor cwiring harness

Related codes

P25D7 P25D9 P25DB P0463 P2068

References: law.cornell.edu, fordservicecontent.com.