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P2635 is a diagnostic trouble code (DTC) for "Fuel Pump ‘A’ Low Flow / Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $69.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P2635 code is a generic powertrain code related to computer output circuit issues. It means that the fuel pump 'A’ is registering a low flow, or one not within the preset parameters.
Codes related to a P2635 include:
The fuel pump uses a connector at the top of the fuel tank to supply power as well as ground to the fuel pump. It also provides power to the sensing wires for the fuel level sender. The fuel level sender communicates fuel level by a float that sits on top of the fuel level. An electric motor moves the gas through and pressurizes the fuel system.
A P2635 code will appear when the engine control module (ECM) detects low fuel flow or low fuel pressure in fuel pump A.
There are several possible causes of a P2635 code including:
Damaged or defective fuel pump (possibly due to damaged brushes, bearings or armature)
Damaged or defective fuel pump relay
Damaged or defective fuel pump driver
Lack of fuel
Damaged or defective ECM (rare)
Symptoms of a P2635 code can include:
A mechanic may use several methods to diagnose a P2635 code including:
There have been reports of vehicles simply being out of fuel or having a damaged or defective fuel gauge and being diagnosed with a P2635 code. Ensure the vehicle has fuel before proceeding with additional diagnosis and repairs.
Because a vehicle may not start or may hesitate during acceleration, this can cause potentially dangerous driving conditions. For this reason, this is considered a serious code and it is recommended to have it diagnosed and repaired as soon as possible.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.