P2632
Fuel Pump B Control Circuit /Open
Fuel delivery
Generic OBD-II
High
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.
High
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.
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?+
Not reliably. Fuel-delivery faults can leave you stranded with a stall or no-start, so treat it as urgent.
Can I just clear P2632?+
The code returns as soon as the open circuit is detected again. Repair the circuit rather than just clearing it.
Related codes
Often seen with P2632
Read & clear P2632 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX