What does code P1238 mean?

Q: What does code P1238 mean?

Fuel Pump Secondary Circuit Fault. P1238 on Ford vehicles indicates that the powertrain control module (PCM) has detected a fault in the secondary circuit of the fuel pump, which is the feedback or monitoring path used to verify that the fuel pump is receiving proper power and ground. The PCM compares expected voltage or current on this circuit against actual values and sets the code when the signal falls outside the acceptable range.

DTC codes / Ford codes / P1238

P1238 · FordFuel Pump Secondary Circuit Fault

P1238 on Ford vehicles indicates that the powertrain control module (PCM) has detected a fault in the secondary circuit of the fuel pump, which is the feedback or monitoring path used to verify that the fuel pump is receiving proper power and ground. The PCM compares expected voltage or current on this circuit against actual values and sets the code when the signal falls outside the acceptable range.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.