Powertrain, generic (extended)

P25D7 Fuel Level Sensor C Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

Fuel level sensor C is a third level input, needed only where the fuel is spread over more chambers or tanks than two senders can cover, for instance on trucks with an extra tank. P25D7 is its general circuit code: the module sees an electrical fault on this input but does not classify it as low, high or intermittent. No manufacturer documents P25D7 publicly. The analogue at sender A shows how such a check works: Ford sets P0460 when the sender resistance stays below 5 ohms or above 200 ohms for 30 s. Regulators insist on supervising these inputs because misfire and evaporative tests may be suspended when the tank is at 15 % or less, and a wrong level can let them run or block them at the wrong time. For the driver the fuel gauge or range display may show nonsense or a substitute value.

Likely causes

Damaged wiring between tank C sender and module, often under the vehicle
Corroded or loose connector at the sender
Sender C defective internally

Symptoms

  • Gauge or range wrong or replaced by a default value
  • 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 cfuel tankwiring harness

Related codes

P25D8P25D9P25DAP25DBP0460P2065

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