Fuel Pump ‘A’ Control Circuit/Open
Table of contents
P0627 MERCURY Possible Causes
- Faulty Fuel Pump Relay
- Faulty Fuel Pump
- Fuel pump harness is open or shorted
- Fuel pump circuit poor electrical connection
- Faulty fuel pump control module (if applicable)
How do I fix code P0627 MERCURY?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0627 MERCURY code
The cost of diagnosing the P0627 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0627 MERCURY Description
The fuel pump control module monitors the fuel pump module and secondary circuits for a concern. If the fuel pump control module detects a concern with the fuel pump module or secondary circuits, the fuel pump control module sends an 80% duty cycle signal on the fuel pump monitor (FPM) circuit to report the concern to the PCM. The test fails when the fuel pump control module is still reporting a concern with the fuel pump module or secondary circuits after a calibrated amount of time.