P0627 Code - Fuel Pump 'A' Control Circuit/Open
Quick Answer
The P0627 diagnostic trouble code (DTC) indicates a problem with the fuel pump 'A' control circuit being open. Common causes include Faulty fuel pump, Open or shorted wiring in the fuel pump control circuit, Defective fuel pump relay. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0627 indicates Fuel Pump 'A' Control Circuit/Open.
- Common causes
- Common causes include Faulty fuel pump, Open or shorted wiring in the fuel pump control circuit, Defective fuel pump relay.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0627 Description
The P0627 diagnostic trouble code (DTC) indicates a problem with the fuel pump 'A' control circuit being open. This means that the engine control module (ECM) is unable to control the fuel pump due to an open circuit in the wiring or a malfunction within the fuel pump itself. The fuel pump is responsible for delivering fuel from the tank to the engine, and if the control circuit is open, it can lead to a lack of fuel delivery, causing the vehicle to stall, hesitate, or have difficulty starting. This issue can significantly impact the vehicle's performance and fuel efficiency. If left unresolved, it can potentially lead to engine damage and other related issues.
Common Causes of P0627
- Faulty fuel pump
- Open or shorted wiring in the fuel pump control circuit
- Defective fuel pump relay
- ECM malfunction
- Poor electrical connection
Symptoms of P0627
- Engine stalling or hesitation during acceleration
- Difficulty starting the engine
- Reduced fuel efficiency
- Engine misfires
- Check engine light illuminated on the dashboard
How to Fix P0627
- Begin by conducting a visual inspection of the fuel pump wiring and connections to check for any obvious signs of damage or corrosion.
- Use a multimeter to test the continuity of the fuel pump circuit to identify any open or shorted wires.
- Inspect the fuel pump relay for proper functionality and replace it if necessary.
- If the fuel pump is determined to be faulty, it will need to be replaced.
- Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0627
The cost of repairing a fuel pump 'A' control circuit/open issue can vary depending on the specific cause of the problem and the make and model of the vehicle. On average, replacing a fuel pump can cost between $300 and $800, including parts and labor. However, additional costs may apply if other components need to be replaced or if the wiring requires extensive repairs. It's recommended to consult with a professional mechanic for a more accurate estimate based on your vehicle's specific needs.
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Code P0627 Information for Specific Makes
- P0627 Acura — Fuel Pump Control System Malfunction
- P0627 Buick — Fuel Pump Speed Output Circuit
- P0627 Cadillac — Fuel Pump Speed Output Circuit
- P0627 Chevrolet — Fuel Pump Speed Output Circuit
- P0627 Chrysler — Fuel Pump Relay Control Circuit
- P0627 Dodge — Fuel Pump Relay Control Circuit
- P0627 Ford — Fuel Pump 'A' Control Circuit/Open
- P0627 Gmc — Fuel Pump Speed Output Circuit
- P0627 Honda — Fuel Pump Control System Malfunction
- P0627 Jeep — Fuel Pump Relay Control Circuit
- P0627 Land Rover — Fuel Pump 'A' Control Circuit/Open
- P0627 Lincoln — Fuel Pump 'A' Control Circuit/Open
- P0627 Mazda — Suction Control Valve Circuit Open
- P0627 Mercury — Fuel Pump 'A' Control Circuit/Open
- P0627 Mitsubishi — Fuel Pump Relay Circuit
- P0627 Toyota — Fuel Pump Control Circuit Open
Frequently Asked Questions about P0627 Code
1. What are the common symptoms of OBDII code P0627 (Fuel Pump 'A' Control Circuit/Open)?
- Common symptoms include hard starting, engine stalling, poor engine performance, and the fuel pump not operating.
2. What can cause OBDII code P0627 to trigger?
- The code can be triggered by issues such as a faulty fuel pump relay, damaged wiring in the fuel pump circuit, or a defective fuel pump control module.
3. How serious is OBDII code P0627 (Fuel Pump 'A' Control Circuit/Open)?
- This code is considered serious as it can lead to the inability to start the vehicle or cause the engine to stall while driving.
4. What are some DIY repair tips for OBDII code P0627?
- DIY repair tips include checking and replacing the fuel pump relay, inspecting the wiring for any damage, and testing the fuel pump control module for proper function.
5. Can driving with OBDII code P0627 (Fuel Pump 'A' Control Circuit/Open) cause further damage?
- Yes, driving with this code can potentially damage the fuel pump or other related components if the issue is not addressed promptly.
6. How can a mechanic diagnose OBDII code P0627?
- A mechanic can diagnose the code using a scan tool to read the fault codes, testing the fuel pump relay, checking the fuel pump circuit for continuity, and inspecting the fuel pump control module.
7. Is it safe to continue driving with OBDII code P0627 present?
- It is not recommended to continue driving with this code present, as it can lead to engine performance issues and potential stalling, which can be dangerous.
8. Are there any common mistakes to avoid when diagnosing OBDII code P0627?
- Common mistakes to avoid include overlooking simple fixes like checking the fuel pump relay or assuming the issue is with the fuel pump itself without inspecting the entire circuit.
9. How much does it typically cost to repair OBDII code P0627?
- The cost of repair can vary depending on the underlying cause, but it may range from $200 to $500 for parts and labor.
10. Can OBDII code P0627 be intermittent in nature?
- Yes, this code can sometimes be intermittent, with the symptoms coming and going depending on the condition of the fuel pump circuit.
Discuss the causes and fixes for P0627 OBDII Code
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what did you find? my 2011 Camaro LT is giving check engine with this code but no problems, I have check harness for moisture in pass front floor board because it had taken on some moisture but it was dry! need help Please!
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You may have a problem with the fuel pump relay. You should check with your dealer if the relay problems cover under the powertrain warranty 5 years / 100,000 miles.
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My husband just replaced the fuel pump relay, and fuel pump in my 2004 dodge intrepid and it still won't stay running he got this code P0627 and code says P0627 - Fuel Pump "A" Control Circuit Open...
Does anyone know what this means? Is it electrical I also found this online
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The code means that the Powertrain Control Module (PCM) has detected an open or short fuel pump relay circuit (open wire). If the relay is OK, then the next step is to check the wire from the relay to the PCM.
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Whats the cause of fuel pump primary circuit ? a code came up p0230 on my 2003 alero oldsmobile 3.4 i check my fuse and i can hear my fuel pump turn on so idk whtat else to do the car turns on but its like it Has a hard time turning on and sometimes it wont even turn on
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There is no information in the factory service manual for the P0627. For the P0320 the problem is the fuel pump relay. You should start by checking the relay. If possible replace the relay.
P0230 OLDSMOBILE - Fuel Pump Relay Control Circuit
Read more: https://www.autocodes.com/p...
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i have this fault code on a 2012 Range rover Supercharged and I would like an opinion. I've checked connections to the Fuel pump control module, the low pressure pump, the high pressure pumps, and at the relay. i suspect i have high resistance on the relay ground due to the fact that it measures roughly 65 ohms when the relay is triggered and the symptoms are that the vehicle will intermittenty not start and it has even shut dwn the engine while my customer was driving 3 times! it is n the british virgin islands and i only have tomorrow with it to continue diagnostics and hopefully solve the issue. the vehicle has had 2 new fuel pumps, camshaft sensors, crank sensor, new fuel pump module, high pressure pumps are providing pressure within the factory specs until it logs the p0627 code.
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after looking at wiring diagrams i have learned that the ground for the relay runs through the bcm before it goes to the ECM, and i am starting to suspect that the bc may be providing the resistance i suspect and i am about to loop it out and see what changes, but i dont know how much resistance i should expect if any with the relay triggered
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