Fuel Pump A Control Circuit Open
The P0627 code means the vehicle's onboard diagnostic system has detected: Fuel Pump A Control Circuit Open. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $100 - $800 (parts and labor)
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What Are the Symptoms of P0627?
- Check Engine Light on
- Fuel pump not running - engine will not start
- Vehicle may enter limp mode
- Possible no-start condition
What Causes P0627? (Most Likely First)
- Open circuit in fuel pump A relay or wiring Very High
- Wiring damage or corrosion in the circuit High
- Poor electrical connection at module or component Moderate
- ECM or control module internal failure Low
Can I Still Drive with P0627?
No — stop driving. P0627 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
Can P0627 prevent my car from starting?
Yes, if the fuel pump cannot operate due to this circuit fault, the engine will crank but not start because no fuel is being delivered to the fuel rail. You may hear the fuel pump priming sound absent when turning the key to ON.
Where is the fuel pump relay?
The fuel pump relay is typically located in the underhood fuse/relay box or in a relay center under the dashboard. Check your owner's manual for the exact location. It is often labeled 'FUEL PUMP' on the relay box cover.
Can I test the fuel pump relay?
Yes. Swap it with another identical relay in the fuse box (such as the horn or AC relay). If the fuel pump works with the swapped relay, the original relay is faulty. You can also test the relay with a multimeter and 12V power source.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0627?
-
Use a scan tool to read data related to Fuel Pump A Control
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Inspect all related wiring, connectors, and grounds for damage, corrosion, or loose connections
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Measure circuit voltage, resistance, and continuity to identify the fault type
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Check for technical service bulletins related to this code for your specific vehicle
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P0627?
- 2010-2020 Ford F-150
- 2008-2018 Chevrolet Silverado
- 2009-2019 Toyota Camry
- 2011-2020 Honda CR-V
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