OBD codes / P0627
P0627
SeriousFuel Pump A Control Circuit/Open
The real risk with P0627 is a stall or a no-start — possibly in traffic, possibly somewhere inconvenient. If the car currently runs, treat that as temporary: keep trips short and get it diagnosed promptly rather than waiting for the day it won't start.
What this code means
P0627 means the computer found an open circuit — a break — in the wiring it uses to control the fuel pump. The pump is usually switched through a relay, and on many vehicles a dedicated fuel pump driver module; a failed relay, a blown fuse, a corroded connector, or a broken wire anywhere in that chain can set this code. When the control circuit is truly open the pump doesn't run, and the engine stalls or won't start because it isn't getting fuel. Intermittent breaks cause the more maddening version: random stalling that recovers, especially over bumps or in damp weather. The relay is the cheap, common suspect and a sensible starting point; the driver module and the wiring to the tank are the deeper checks.
Symptoms you might notice
- Engine cranks but won't start
- Sudden stalling, sometimes intermittent
- No fuel pump hum from the tank when the key is switched on
- Long cranking before start
- Check-engine light
What it costs to fix
Typical range: $20–$600 · about ~0.2–2 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Fuel pump relay | $15–$50 | ~0.2–0.5 hrs |
| Wiring / connector repair | $5–$100 | ~0.5–2 hrs |
| Fuel pump driver module (where fitted) | $100–$400 | ~0.5–1.5 hrs |
A relay is cheap and quick; wiring repairs depend on where the break is; a fuel pump driver module is the pricier electronic fix. If diagnosis shows the pump itself has failed, that's a separate and larger job — this code is about the control circuit, so test before replacing the pump.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0627 for my exact vehicle →
Frequently asked
Can I drive with P0627?
Only if you accept the risk of a sudden stall or being unable to restart. The fault is in the circuit that runs the fuel pump, and an intermittent break can cut fuel without warning. Prompt diagnosis is strongly advised.
Is P0627 the fuel pump itself?
Not necessarily — the code points at the control circuit: relay, fuse, wiring, or driver module. Those are all cheaper than a pump. A good diagnosis confirms whether the pump ever receives power before anyone drops the tank.
What's the cheapest thing to check first?
The fuel pump relay and its fuse. Relays are inexpensive, commonly fail, and on many cars you can swap in an identical relay from another slot as a quick test.
Why does my car stall randomly with this code?
An intermittent open — a loose pin, a corroded connector, a chafed wire — cuts pump power momentarily, the engine dies from fuel starvation, and then it may restart once contact returns. Bumps, heat, and moisture often trigger it, which is a useful clue for the diagnosis.
Seeing P0627 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0627 for my vehicleSymptoms that trigger P0627
Drivers who get this code often notice one of these — each has its own likely-causes and cost guide:
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0627 from your phone — see our honest guide to the best OBD2 Bluetooth adapters.
Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.