What does code P027A mean?

Q: What does code P027A mean?

Fuel Pump Module B Control Circuit/Open. P027A indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the control circuit for fuel pump module B, which is typically the secondary or auxiliary fuel pump on vehicles with a dual-pump system. The PCM commands the pump on and monitors the circuit for expected voltage or current feedback, and when the feedback falls outside the expected range, it sets this code and may disable the pump circuit to protect the driver.

DTC codes / P02xx · Fuel and air metering (injector circuits) / P027A

P027AFuel Pump Module B Control Circuit/Open

P027A indicates that the powertrain control module (PCM) has detected an open circuit or excessive resistance in the control circuit for fuel pump module B, which is typically the secondary or auxiliary fuel pump on vehicles with a dual-pump system. The PCM commands the pump on and monitors the circuit for expected voltage or current feedback, and when the feedback falls outside the expected range, it sets this code and may disable the pump circuit to protect the driver.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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