P027C
Fuel Pump Module B Control Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuel pump module wiring for any loose or damaged connections
- Inspect and test the fuel pump module relay for proper functionality
- Verify the fuel pump module power supply voltage and ground
- Replace the fuel pump module if it is found to be faulty
- Consider checking and cleaning the fuel tank and filter to ensure proper fuel flow
Common causes
Most likely first
- Faulty fuel pump module
- Loose or corroded wiring or connectors in the fuel pump control circuit
- Malfunctioning fuel pump relay
- Low voltage supply to the fuel pump module
- Faulty engine control module (ECM)
How to diagnose & fix
Work through it in order
- Engine stalls or has difficulty starting
- Poor engine performance or reduced power
- Decreased fuel efficiency
- Illuminated check engine light
- Difficulty in maintaining a consistent speed or acceleration
Read & clear P027C yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.