P0232 — Fuel Pump Secondary Circuit Low
Drivable short-term, but fix now to avoid damage.
What P0232 means
This code means the engine computer detected low voltage in the secondary side of the fuel pump circuit, which carries power to the pump itself. The result can be insufficient fuel pressure, leading to stalling, hard starting, or poor performance. Typical fixes include repairing wiring and connectors, replacing the fuel pump relay or driver module, or replacing the fuel pump.
Common symptoms
- Check engine light is on
- Engine hesitates or lacks power under load
- Hard starting or long cranking times
- Engine stalls, especially under acceleration
- Occasional no-start condition
Common causes
- Damaged or corroded wiring in the secondary pump circuit
- High resistance or loose electrical connectors
- Faulty fuel pump relay
- Failing fuel pump driver module
- Worn or failing fuel pump
Typical repair cost
$150 – $750
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0232 code?
Short trips are usually okay if the car still runs well, but low voltage to the fuel pump can cause stalling or a no-start. Avoid long drives and get it inspected soon to be safe.
How much does it cost to fix a P0232 code?
Repairs generally run from about $150 to $750. Fixing wiring or a relay is cheaper, while replacing the fuel pump or driver module costs more.
Is a P0232 code serious?
Yes, it can be. Low voltage in the fuel pump circuit can reduce fuel pressure and cause stalling or a no-start, so it should be addressed without long delays.
What does 'secondary circuit low' actually mean?
It means the voltage on the power side of the fuel pump circuit is reading lower than expected. This often points to high resistance from corroded wiring or connectors, but a weak relay or pump can also be to blame.