What is OBD-II Code P2632 – Fuel Pump B Control Circuit /Open

Troubleshooting OBD-II Code P2632 – Fuel Pump B Control Circuit /Open

As a mechanic, one of the common issues car owners come to us with involves OBD-II codes, particularly P2632 – Fuel Pump B Control Circuit /Open. If you’re reading this article, chances are you’re one of these car owners looking for a comprehensive and informative guide that can help you understand the issue and troubleshoot it properly.

In this article, we’ll explain what OBD-II Code P2632 is, what causes it, how to diagnose the issue, and how to repair it. We’ll use simple language that even car owners who don’t have a lot of technical knowledge can understand. Follow along to become more knowledgeable about fixing your vehicle.

What is OBD-II Code P2632?
OBD-II Code P2632 is a fault code that indicates a problem with the fuel pump control circuit in the secondary fuel pump of the vehicle. This code means that the controller circuit for the fuel pump B is open, which in turn causes issues with the fuel delivery system. The fuel pump control module is unable to control the secondary fuel pump, causing the engine to experience fuel-related problems.

What Causes OBD-II Code P2632?
When you receive OBD-II Code P2632, there are two common causes of the issue. The first reason your car may experience this code is due to an electrical issue in your fuel pump control module. The second reason may be due to a problem in the wiring harness that connects the control module to the secondary fuel pump. One or both of these issues can cause your vehicle’s P2632 code to trigger.

How to Diagnose OBD-II Code P2632?
Now that you understand what this code means, the next logical step is to diagnose the real issue. When diagnosing P2632, you will need a scan tool that can read and clear codes. To diagnose, follow the steps below:

Start by using the scan tool to read the OBD-II code from the vehicle’s computer. The scan tool will display P2632 as a diagnostic trouble code on your screen.
Once you have the code, check the fuel pump’s wiring harness connectors for any wear or damage. Ensure they are connected correctly and not corroded.
If the wiring harness is in good condition, test the auxiliary wiring to check for any open circuits.
Finally, Test the fuel pump B for resistance, current flow, and functionality.

If after all these checks, the problem persists, replace the fuel pump B control module.

How to Repair OBD-II Code P2632?
The final step is to repair the issue on your vehicle. After identifying and diagnosing OBD-II Code P2632, follow the steps below for the issue to be resolved:

Start by disconnecting the battery.

Next, remove the fuel pump control module from your vehicle.

Install the new fuel pump B control module in the correct position; please note that this may differ depending on the car model.

Reconnect the fuel pump control module wires and connectors in the correct place; ensure that all components are connected as per the manufacturer’s specifications.

Finally, reset the OBD-II code by connecting the battery and starting the vehicle.

Overall, properly diagnosing and fixing P2632 requires following the steps we’ve presented. Most importantly, take note that repair also depends on your car model and other factors unique to your vehicle.

Frequently Asked Questions About OBD-II Code P2632

Q: Can I still drive my car if P2632 occurs?
A: We do not recommend driving your car when OBD-II Code P2632 occurs. The code indicates there is an issue with the secondary fuel pump, which provides fuel to the engine. It is best to repair your vehicle before driving it to avoid further damage.

Q: What is the cost to repair OBD-II Code P2632?
A: The cost to repair P2632 can range depending on the root cause of the problem, your car make and model, and the geographic location. In general, repairs range from $500 to $1,000.

Q: How often should I check for OBD-II codes?
A: We recommend checking for OBD-II codes every six months or after 6,000 miles. Doing this ensures that your vehicle is running smoothly and there are no underlying issues that require repair.

Q: Can I clear the P2632 code from my vehicle’s computer by disconnecting the battery?
A: Disconnecting the battery will clear the code; however, it will not fix the problem causing the code. We recommend diagnosing and fixing the issue before clearing the code.

Q: Can I fix OBD-II Code P2632 myself or should I take it to a mechanic?
A: While it is possible to fix P2632 yourself, we recommend taking it to a certified mechanic. Fixing the issue requires in-depth knowledge of your vehicle’s electrical system, including the fuel pump wiring and control module.


OBD-II Code P2632 – Fuel Pump B Control Circuit /Open is a frustrating issue for any car owner. It is best to address it as soon as possible to avoid further damage. Following our diagnostic processes above will help you find the root cause of the problem, repair the issue, and get back on the road safely. Remember, always contact a certified mechanic if you’re unsure or need additional assistance.

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