P2635 2014 Chevrolet Silverado Code - Fuel Pump Flow Performance
Quick Answer
The Engine Control Module (ECM) supplies voltage to the fuel pump driver control module when the ECM detects that the ignition is on. Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection. 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
- P2635 2014 Chevrolet Silverado indicates Fuel Pump Flow Performance.
- Common causes
- Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection.
- 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.
Code P2635 2014 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when the fuel pump driver control module detects a difference of ± 60 kPa (8.7 PSI) at 400 kPa (58 PSI) request or ±45 kPa (6.5 PSI) at 300 kPa (43.5 PSI) request between the desired fuel pressure and the actual fuel pressure for approximately 10 s.
What are the Possible Causes of the DTC P2635 2014 Chevrolet Silverado?
- Faulty Fuel Pump
- Fuel Pump harness is open or shorted
- Fuel Pump circuit poor electrical connection
- Faulty Fuel Pump Control Module (if applicable)
How to Fix the DTC P2635 2014 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
- 2014-2018 Chevrolet Silverado
- 2015-2018 Chevrolet Suburban
- 2015-2018 Chevrolet Tahoe
If the Diagnostic Trouble Codes (DTC) P2635, U0074, and/or U18A2 are set, it may be found that the actual fuel pressure (low-pressure system) will be reading substantially higher than desired fuel pressure, in this case, the cause of the problem is a loss of communication between Engine Control Module (ECM) and Fuel Pump Control Module (FPCM).
- Diagnose for any communication DTCs set (U0074 would take priority over U18A2 if both set) before addressing DTC P2635.
- If DTC P2635 is not resolved by correcting the communication DTCs, only then should diagnose the DTC P2635.
- It has been found that a communication issue between the FPCM and ECM can potentially induce DTC P2635 and result in a pressure differential between actual and desired fuel system pressures.
- If the actual fuel pressure is substantially higher than desired (10 psi / 70 kPa or more), replacement of the fuel pump control module or fuel system components typically will not resolve this issue.
- If the actual fuel pressure is substantially lower than desired (10 psi / 70 kPa or more), this Factory Service Bulletin would NOT apply. It would be recommended to diagnose low actual fuel pressure.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2635 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P2635 2014 Chevrolet Silverado code?
Need more information on how to fix the P2635 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2635 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2635 2014 Chevrolet Silverado Code
1. What are the common symptoms of OBDII code P2635 in a 2014 Chevrolet Silverado related to fuel pump flow performance?
The common symptoms include poor engine performance, reduced fuel efficiency, difficulty starting the vehicle, and stalling while driving.
2. What could cause OBDII code P2635 to trigger in a 2014 Chevrolet Silverado?
The code P2635 typically indicates a problem with the fuel pump flow performance, which could be caused by a clogged fuel filter, a failing fuel pump, a faulty fuel pressure regulator, or issues with the fuel injectors.
3. How can I diagnose the OBDII code P2635 in my 2014 Chevrolet Silverado?
Diagnosing code P2635 often involves checking the fuel pressure using a gauge, inspecting the fuel pump, fuel filter, and fuel lines for any blockages or damage, and testing the fuel pressure regulator and fuel injectors for proper function.
4. What are some repair tips for fixing OBDII code P2635 in a 2014 Chevrolet Silverado?
Repair tips may include replacing the fuel filter, fuel pump, or fuel pressure regulator if found to be faulty, cleaning or replacing clogged fuel injectors, and ensuring proper fuel system maintenance.
5. Can driving with OBDII code P2635 in a 2014 Chevrolet Silverado cause further damage?
Continuing to drive with code P2635 may lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components due to inadequate fuel flow.
6. How much does it typically cost to repair OBDII code P2635 in a 2014 Chevrolet Silverado?
The cost of repairing code P2635 can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
7. Are there any preventive measures to avoid triggering OBDII code P2635 in a 2014 Chevrolet Silverado?
Regularly changing the fuel filter, using high-quality fuel, and following the manufacturer's recommended maintenance schedule for the fuel system can help prevent issues that may trigger code P2635.
8. Can a DIY enthusiast fix OBDII code P2635 in a 2014 Chevrolet Silverado?
While some aspects of diagnosing and repairing code P2635 can be tackled by experienced DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair to avoid further complications.
9. Is it safe to drive my 2014 Chevrolet Silverado with the check engine light on due to OBDII code P2635?
It is not recommended to drive the vehicle with the check engine light on, as it indicates a potential issue that needs to be addressed promptly to prevent further damage and ensure safe operation of the vehicle.
10. How long does it usually take to repair OBDII code P2635 in a 2014 Chevrolet Silverado?
The repair time for code P2635 can vary depending on the specific cause of the issue and the availability of parts, but it may take a few hours to a day for a professional mechanic to diagnose and fix the problem.
Discuss the causes and fixes for P2635 2014 Chevrolet Silverado OBDII Code
Code P2635 2014 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
