Fault Code Lookup › Powertrain codes › P2635
P2635 Powertrain · generic OBD-II
Fuel Pump 'A' Low Flow / Performance
P2635 is a standard code covering engine, transmission, fuel and emissions. It names the system that logged the fault, not the part that failed. Below: which cars owners reported it on, what happened, and recalls on those cars, from 14 complaints filed with NHTSA. Updated November 9, 2026.
- 14owner reports
- 10car models
- 0mention a crash
- 0mention a fire
- 2013–2023model years
Which cars get code P2635?
Every model whose owners mentioned P2635 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Chevrolet Camaro
1 reportChevrolet Equinox
1 reportChevrolet Malibu
1 reportChevrolet Silverado
1 reportChevrolet Traverse
1 reportGMC Acadia
1 reportGMC Sierra
1 reportGMC Yukon
1 reportGMC Yukon XL
1 reportWhere does P2635 show up?
By brand
- Chevrolet11
- GMC3
Component the owner filed it under
Is there a recall for P2635?
The others concern the component owners file this code under (Fuel/Propulsion System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Fuel System, Diesel: Storage: Tank Assembly General Motors, LLC (GM) is recalling certain 2017-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 vehicles equipped with a dual fuel tank option. The rear fuel tank may collapse and prevent the fuel pump from transferring fuel to the front tank, resulting in an engine stall.
2017 Chevrolet Silverado, 2018 GMC Sierra. Full risk and remedy on each car's report.
Fuel System, Gasoline: Storage: Tank Assembly General Motors, LLC (GM) is recalling certain 2016-2018 GMC Sierra 3500 and Chevrolet Silverado 3500 trucks equipped with gasoline engines and dual fuel tanks. The fuel-level sensor in the front tank may stick in a low-level position, allowing the rear tank to overfill the front tank.
2017 Chevrolet Silverado, 2018 GMC Sierra. Full risk and remedy on each car's report.
What happened when owners saw P2635?
10 of the 14 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
This vehicle is owned by the City of Fort Lauderdale Police Department. We are submitting complaints for multiple Tahoe's that have stopped during operation causing extreme danger to our staff and other drivers in the city. The cause is always bad fuel pumps and our units have had to have the pumps replaced in some cases multiple times. 7-12-23 Stalled in intersection and turned off Engine wont start Will start again after several minutes CHECK UNIT CODE P2635 PINPOINT TEST NEED FUEL PUMP 2-12-24 Sputters and stalls and stumbles CHECK UNIT NO ENGINE LIGHT AND NO CODES. REPLACE FUEL PUMP DRIVER MODULE
…The vehicle has experienced fuel-system-related diagnostic trouble codes, including P2635 (Fuel Pump Flow Performance), P069E, and P018B. The high-pressure fuel pump has already been replaced, but the problem has continued. General Motors has also issued technical information addressing heat-related fuel system concerns involving this engine/platform. I have raised the issue with Chevrolet/General Motors and have GM case number XXX. Despite the recurring safety-related symptoms, I have not been provided with a permanent repair that makes the vehicle reliably safe to operate under the environmental conditions in which it was sold and is normally driven. My concern is not simply that the…
SERVICE ENGINE LIGHT COMES ON FREQUENTLY. CAR RUNS VERY ROUGH. STALLS. TOOK TO DEALER. REPORT RECEIVED: IN AMBIENT TEMPERATURES 100 F DEGREES OR HIGHER, DTCS P2635 AND/OR P108B MAY SET. THE VEHICLE MAY ALSO EXHIBIT A HESITATION OR STALLING CONDITION. CAUSE: EXCESSIVELY HOT AND SUSTAINED AMBIENT TEMPS OVER 100 F DEGREES CAUSING VAPORT BUILDUP IN FUEL FEED LINE. ADVISED TO USE GREATER THAN 91 OCTANE FUEL, KEEP IN COVERED GARAGE. THERE IS NO FIX! WHAT HAS HAPPENED TO US: WHILE DRIVING ON INTERSTATE, WHEN TRYING TO ACCELERATE, CAR BOGS DOWN AND WILL NOT ACCELERATE, SLOWING WHILE IN HEAVY TRAFFIC. ON WAY HOME, 96 DEGREE DAY, TWO BABIES IN CAR WITH GROCERIES, STOPPED AT A LIGHT ON HEAVILY…
My 2015 Malibu continues to have problems. I have a constant P Code (P2635) that refers to the fuel pump (Low Performance). The Malibu has the auto stop but at times the vehicle wants to lunge forward. It also at a stop not only goes to the auto stop (engine ) but cut off all the way . Which this result in having to place the car back in park to re-start. I have seen a youtube video of a hotspot (wear) on the wiring harness that is located in the right rear fender well that this blue and white wire was worn and broken possible causing this problem. Other that this issue the vehicle is good and still gets around 35mpg.
Code: P2635 Fuel pump ‘A’ low flow/ performance It only happens when it’s warm outside. It was doing this last summer and during the winter it stopped now it’s 80 degrees + outside it’s throwing the code again
Vehicle: 2023 Chevrolet Traverse The vehicle has a recurring safety-critical defect. The steering assist becomes reduced while driving and the dashboard displays the warning message “Steering Assist Reduced – Drive with Care.” At the same time, multiple safety systems such as collision-avoidance functions become disabled. This failure is persistent and creates unsafe driving conditions. The vehicle has previously experienced electrical and fuel-system related issues, including fault codes such as P2635, P0E32 and P0E37. There have been multiple warranty repair attempts, but the defect continues. The warning remains active while driving and the vehicle may lose steering assist, causing…
2015 gmc Acadia, vin ending 7457,p2635,stuttering/hesitation and engine stalling when Arizona temperatures exceed 100* f , and mechanic advising that the condition corresponded to a known gmc issue for which they could not obtain an applicable corrective part / repair
AFTER LONG PERIODS OF RUNNING AND IDLE, VEHICLE STALLS OUT HAS A HARD TIME RESTARTING. GAS PADDLE BEING PRESS HELPS SOMETIMES. CHECK CODE P2635 PLUS OTHERS (RANDOM SECONDARY CODES), COME ON. THIS HAS TAKEN PLACE IN AZ WHERE THE AMBIENT AIR TEMPERATURE TYPICALLY IS OVER 100. VEHICLE HAS BEEN TO GM DEALER WHO SAYS ITS VAPORIZING THE FUEL IN THE LINES. TSB PIP5507B DOSE NOT INCLUDE 2018, HOWEVER THE DESIGN HASN'T CHANGED. CONDITIONS; LONG IDLE, HOT WEATHER, LOW SPEEDS UNDER 25 MPH OR IDLE. LOCATION; AZ SONRONA DESSERT, OFF-ROAD, JOBSITE, CITY STREETS.
Engine stalling, a rough-running engine, reduced power mode (sluggish acceleration), a "Check Engine" light, or the vehicle failing to start. It started puttering really bad and died in the middle of the intersection. Check engine light came on. I got it to start, was really hard start and puttered bad then it died again and then I got it to start again, was a really hard start and puttered and died again. I was able to start it again get in the driveway but couldn’t go very fast. Check engine codes present are P2635 and P018B
This vehicle is owned by the City of Fort Lauderdale Police Department. We are submitting complaints for multiple Tahoe's that have stopped during operation causing extreme danger to our staff and other drivers in the city. The cause is always bad fuel pumps and our units have had to have the pumps replaced in some cases multiple times. 7-5-23 Cause- Performed DTC scan and found coed P2635 which signifies Fuel pump A Low flow/ performance. With key on, engine off I used a scan tool to command the fuel pump on while monitoring the fuel pressure sensor parameter and found that the fuel pressure was below specifications of 46-84 psi. Inspected fuel pump assembly and connector and no faults were…
P2635: questions drivers ask
What does code P2635 mean?
P2635 is a generic OBD-II powertrain code. Its standard definition is "Fuel Pump 'A' Low Flow / Performance". The code tells you which system set the fault, not which part failed; the owner reports on this page show what it meant in practice for 10 car models.
Which cars get code P2635 most often?
In NHTSA owner complaints, P2635 is mentioned most for the Chevrolet Tahoe (6), Chevrolet Camaro (1), Chevrolet Equinox (1), across 10 models and model years 2013 to 2023. Popular models collect more reports because more of them are on the road.
Is there a recall for code P2635?
No NHTSA recall text names P2635 directly. 2 recalls on the cars that report this code concern the same component owners name most (Fuel/Propulsion System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P2635?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P2635. The definition is the generic SAE J2012 wording; a carmaker may use the code slightly differently. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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