Powertrain, generic · Fuel and air metering (injector circuit)
P025D Fuel Pump Module A Control Circuit High
Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo
On demand-controlled fuel systems the engine module does not drive the pump itself but sends a pump control module the desired pump output on a separate control line, usually as a duty cycle; the module reports back on a monitor line or via CAN. P025D means the control circuit to pump module A reads high, typically a short to voltage. On Ford's 3.0 diesel the pump module detects it; on the 6.7 it means a short to voltage on the low side of the pump relay – both continuously monitored and set within 0.5 s. Depending on the design the pump then runs all the time or not at all.
Likely causes
Control line shorted to battery voltage or another wire
Moisture in the connector (leakage to voltage)
Pump control module faulty
Relay stuck or faulty (Ford 6.7)
Symptoms
- Check engine light on
- Pump runs all the time or not at all
- Starting problems
Repair estimate
DifficultyMediumWorkshop job
Parts and labour€80–700
Time1–3 h
Typical range across vehicles; the real cost depends on what the testing finds.
Parts involved
fuel pump control module afuel pump control wiringengine control module
Related codes
References: law.cornell.edu, fordservicecontent.com, static.nhtsa.gov.