Fuel Pump Module B Control Circuit/Open
Open circuit at fuel pump module B (second pump module on dual-tank or high-output fuel systems).
Affected components
- Fuel pump module b
- Module wiring
Common causes
- High likelihood: Wiring break
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
Possible symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- Reduced-power or limp mode may occur
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.