What is the P0629 fault number? What is the description of the Fuel Pump “A” Control Circuit High failure? How can you fix P0629 fault codes? What are the causes and symptoms of the P0629 error code?
What is the P0629 fault code? What does it all mean?
If the powertrain control module (PCM) or one of the supporting control modules detects a very high voltage signal on the fuel pump “A” control circuit, a code P0629 is set.
Other control modules that detect this fault and trigger the code are:
- – Body Control Module
- – Fuel injection control module
- – Alternative fuel control module
- – Turbo control module
- – Antilock brake control module
- Anti-theft module
- – Instrument cluster control module
- – Cruise control module
- – Traction control module
- Distance warning control module
- – Climate control module
The overall vehicle’s drivability depends on the fuel pump. The fuel pump will shut off the engine’s fuel supply if it fails. The control circuit, which is usually located in the back of the engine, controls whether the pump turns on or off depending on the needs of the operator.
P0629 is one of the most mysterious codes that can be found in gasoline and diesel vehicles. Diesel and petrol vehicles may have different diagnostic methods and descriptions. This explanation and fault diagnosis method is only applicable to gasoline vehicles.
The P0629 fault code can affect vehicles of all makes and models, including but not limited to: Suzuki, Land Rovers, Dodge, Mercedes-Benzes, Chevrolet, Cadillacs, Ford, Chrysler, Nissan, Mitsubishi, Chrysler, Ford, Chrysler, Dodge, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Dodge, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Dodge, Mercedes-Benz and Toyota.
What is the P0629 Fault Code and Why Does It Happen?
Below are some reasons to set fault code P0629:
- – Defective fuel pump
- – Defective fuel pump relay
- – Fuel pump harness, open or shorted
- – A poor electrical connection to the fuel pump
- – Broken, damaged, or melted wires, or loose and rusty connections in the CAN bus wiring harness
- – Defective CAN bus
- You may have a fuel pump control system module in your vehicle. If this happens, the code could be lost.
What are the symptoms for P0629 Malfunction Codes?
These symptoms may be present in vehicles with code P0629.
- – Illumination at the check engine lights
- – Low engine performance
- – Engine may not start but it starts
- – The engine starts but stops instantly
- Engine misfire
- Engine stalling during driving
- – Increased fuel consumption
How do I fix the P0629 fault code?
There are several repairs that can resolve the P0629 fault code.
- – Relay for fuel pump repair or replacement
- – Replace or repair loose or damaged cables or connectors
- – Replacing wiring harness for fuel pump
- Inspect all electrical components, cables and connectors within the CAN bus harness. You should replace any parts that are damaged, melted, or missing.
- – Replacing a faulty fuel pump
How Serious Is the P0629 Fault Code
A code P0629 means that your vehicle has a moderately severe problem. You can still use your vehicle despite the malfunction. There may be intermittent fueling, which could cause an uneven fuel mixture or other problems. This can lead to engine damage. You should immediately diagnose the issue and avoid using it.
