AutoCodes – Buick – P2632 Buick

P2632 Buick Code - Fuel Transfer Pump Relay Control Circuit

Quick Answer

The Engine Control Module (ECM) enables the secondary fuel pump relay when the primary fuel tank is below approximately 50 liters (13.2 gallons) and will run until the primary tank is filled to approximately 70 liters (18.5 gallons) or until the secondary tank is empty. Common causes include Faulty Secondary Fuel Pump Relay, Secondary Fuel Pump Relay harness is open or shorted, Secondary Fuel Pump Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P2632 Buick indicates Fuel Transfer Pump Relay Control Circuit.
Common causes: Common causes include Faulty Secondary Fuel Pump Relay, Secondary Fuel Pump Relay harness is open or shorted, Secondary Fuel Pump Relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 309

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 01, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2632 Buick Description

The Engine Control Module (ECM) enables the secondary fuel pump relay when the primary fuel tank is below approximately 50 liters (13.2 gallons) and will run until the primary tank is filled to approximately 70 liters (18.5 gallons) or until the secondary tank is empty. The ECM provides ignition positive voltage to the coil side of the fuel transfer pump relay. The ECM energizes the fuel transfer pump relay, which applies power to the fuel transfer pump.
The control module monitors the voltage on the fuel transfer pump relay control circuit. If the control module detects an incorrect voltage on the fuel transfer pump relay control circuit, a fuel transfer pump relay control Diagnostic Trouble Code (DTC) sets.

OBDII Code P2632 Buick - Fuel Transfer Pump Relay Control Circuit - AutoCodes.com — P2632 Buick Code - Fuel Transfer Pump Relay Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2632 Buick?

Faulty Secondary Fuel Pump Relay
Secondary Fuel Pump Relay harness is open or shorted
Secondary Fuel Pump Relay circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2632 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2632 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2632 Buick code?

Need more information on how to fix the P2632 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2632 Buick code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2632 Buick Code

1. What are common symptoms of OBDII code P2632 in a Buick related to the fuel transfer pump relay control circuit?

The common symptoms include difficulty starting the vehicle, engine stalling, and issues with fuel delivery.

2. What are potential causes of OBDII code P2632 in a Buick?

Potential causes of this code include a faulty fuel transfer pump relay, wiring issues in the relay circuit, or a malfunctioning fuel transfer pump.

3. How can I diagnose the cause of OBDII code P2632 in my Buick?

Diagnosing this code involves checking the fuel transfer pump relay, inspecting the wiring for any damage or loose connections, and testing the fuel transfer pump for proper functionality.

4. Can I still drive my Buick with OBDII code P2632?

It is not recommended to drive your Buick with this code present, as it can lead to potential issues with fuel delivery and engine performance.

5. How can I repair OBDII code P2632 in my Buick?

Repairing this code typically involves replacing the faulty fuel transfer pump relay, repairing any damaged wiring, or replacing the fuel transfer pump if necessary.

6. Is it possible to reset OBDII code P2632 in my Buick without making any repairs?

While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent further problems.

7. Are there any preventive maintenance tips to avoid OBDII code P2632 in my Buick?

Regularly inspecting the fuel transfer pump relay and wiring, as well as ensuring proper fuel system maintenance, can help prevent issues that may trigger this code.

8. Can a DIY enthusiast fix OBDII code P2632 in a Buick?

Depending on your skill level and access to tools, you may be able to address this code yourself by following repair guides or seeking assistance from online forums.

9. How much does it cost to repair OBDII code P2632 in a Buick at a mechanic?

Repair costs can vary based on the extent of the issue and rates charged by the mechanic, but it is advisable to obtain a few quotes for comparison.

10. Will OBDII code P2632 cause any long-term damage to my Buick if left unaddressed?

Continuing to drive with this code present can potentially lead to further damage to the fuel system and engine, so it is best to address the issue promptly.