P0627 Code: Fuel Pump “A” Control Circuit / Open

Identifying possible issues in your vehicle is much easier thanks to on-board diagnostic or OBD codes. These trouble codes help professional or home mechanics pinpoint which system or component might need repairs.

Code P0627 is one of many trouble codes that can be logged and retrieved from the OBD system. Here is some helpful information that can help you understand what getting this code can mean for your vehicle.

What Does the P0627 Code Mean?

Diagnostic trouble code (DTC) P0627 stands for “Fuel Pump “A” Control Circuit/Open.” This code is logged when the powertrain control module (PCM) detects that the fuel pump is not operating properly.

The fuel pump is vital to the overall drivability of your vehicle. If the PCM detects a problem in the fuel pump “A” control circuit, then it will log error code P0627. The control circuit, on the other hand, is responsible for turning the pump on and off on command. An open within the said circuit can also trigger code P0627.

Depending on the severity of the problem, related error codes might also be stored with this DTC. Code P0627 is similar to error codes P0628, P0629, and P062A.

Note: The definition of code P0627 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0627 Code?

• Issues within the fuel pump
• Wiring issues
• Faulty CAN bus
• High resistance in the circuit
• PCM failure

What are the Common Symptoms of the P0627 Code?

• Illuminated check engine light
• Poor engine performance
• Engine might not start
• Poor fuel economy
• Engine misfire/stall

How to Diagnose the P0627 Code

Different makes and models can set the error code P0627. However, the recommended diagnostic procedure may vary between auto manufacturers.

Check out this video to get an idea of what the diagnostic process for this OBD code might involve:

How to Fix the P0627 Code

Code P0627 shares similar triggers and symptoms with other engine codes. To make sure you don’t waste your time and money on repairs, it’s best to leave the job to a certified mechanic.
If you’re considering troubleshooting this code on your own, it’s a good idea to refresh your automotive knowledge before attempting any fixes. Consult a vehicle-specific repair manual or an online repair database to learn the appropriate diagnostic procedures for this code.