Cause
Failed fuel pump relay
The relay switching the fuel pump. Cheap, easy to reach and it fails far more often than the pump in the tank — so a no-start with no fuel pressure is worth testing here before the tank comes out or the rear seat comes up.
Typically an easy fix. Often worth checking before paying anyone to look.
Some of these codes mean you should stop driving
5 of the 8 codes this can cause indicate a fault where continuing to drive risks damage or is unsafe. Which one you have matters more than the cause does — read the code's own page before deciding.
Codes this can cause (8)
Codes where this is a likely explanation first, rather than merely a possible one.
- P0230 Fuel Pump Primary Circuit Likely for this code Stop driving High
- P0232 Fuel Pump Secondary Circuit High Likely for this code Stop driving High
- P0233 Fuel Pump Secondary Circuit Intermittent Likely for this code Stop driving High
- P0627 Fuel Pump A Control Circuit Open Likely for this code High
- P0628 Fuel Pump A Control Circuit Low Likely for this code High
- P0629 Fuel Pump A Control Circuit High Likely for this code High
- P0231 Fuel Pump Secondary Circuit Low Stop driving High
- P2635 Fuel Pump A Low Flow or Performance Stop driving High
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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