Fuel Pump B Control Circuit /Open
What it means
P2632 means the control module has detected an open (broken) circuit in the control wiring for fuel pump B — a secondary or auxiliary fuel pump on vehicles that use one. Because it interrupts fuel delivery, this code can cause hard starting, stalling, or a no-start, so it's worth addressing before the car strands you.
Can I keep driving? Risky — an open fuel-pump control circuit can cause hard starting, stalling, or a no-start. Don't rely on the car until it's fixed.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on
- Hard starting or extended cranking
- Stalling, hesitation, or lack of power under load
- No-start in some cases
Common causes
Most likely first
- Faulty fuel-pump relay or fuel-pump control moduleLikely
- Open or shorted wiring in the pump B control circuitCommon
- Corroded or loose connector at the relay or pumpCommon
- Blown fuse in the pump circuitLess often
- Faulty control-module driverLess often
How to diagnose & fix
Work through it in order
- Check the fuel-pump fuse and relay first; swap the relay to test.
- Inspect the pump B control wiring and connectors for an open or corrosion.
- Verify the control module is commanding the pump on.
- Test fuel pressure to confirm delivery.
- Replace the relay or pump as needed. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2632?+
Can I just clear P2632?+
Related codes
Read & clear P2632 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.