The OBD2 code P008A indicates that the vehicle’s onboard diagnostics system has detected an issue with the low-pressure side of the fuel system, specifically that the pressure is too low. This code is crucial for vehicles like the 2017 Nissan Titan, 2012 Land Rover LR4, and 2013 Ford F-550, as it can affect the engine’s performance by leading to conditions such as hesitation, low power, or even stalling.
P008A quick overview
| Meaning | P008A: Low pressure fuel system pressure – too low |
| Is it serious? | Yes, it can significantly impact engine performance and potentially lead to engine damage. |
| Possible causes | – Faulty fuel pump – Clogged fuel filter – Leaks in the fuel line – Issues with the fuel pressure sensor |
| How to diagnose? | Inspect the fuel filter and housing for leaks or damage. Check the fuel pump for proper operation and pressure output. Examine fuel lines for any signs of leaks or damage. Test the fuel pressure sensor for accuracy and functionality. Consult Identifix and TSBs for any known issues and fixes related to these codes. |
P008A Meaning
For those who might not be familiar with how a car works, think of the fuel system like the circulatory system in your body, with the fuel pump acting as the heart. The P008A code means there’s a problem with the “blood pressure” on the low side, where the fuel is not being pushed through the system with enough force.
This can make your car feel sluggish or hesitant because it’s not getting the fuel it needs to go smoothly. It’s a sign that something is blocking the flow or the pump isn’t working as well as it should.
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
How to fix P008A – learn from mechanics
I looked into P008A service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: Nissan
Vehicle information 2017 Nissan Titan XD PRO-4X 5.0L
Issue + repair history
- Came in with codes P2560, P203F, and P008A.
- Noted a fuel filter housing leak.
- No mention of symptoms.
- No success decoding vehicle VIN.
Other OBD2 Codes + Test Results
- P2560
- P203F
- P008A
Mechanic suggestions
- Check Identifix for troubleshooting info and TSBs related to the codes.
- Gather more information about symptoms, access to service manuals, and scan tool being used.
- Use a good scanner to diagnose P codes.
- Consider purchasing truck info from AllData DIY.
- Repair fuel filter housing leak.
- Utilize online resources like Google for additional guidance.
Final fix
- Replaced the entire fuel filter housing, resolving the issues.
Case #2: Land Rover
Vehicle information 2012 Land Rover LR4 HSE 5.0L
Issue + repair history
- Intermittent check engine light.
- Codes:
- P0133: Universal heated exhaust gas sensor – Circuit Slow response (Bank 1 Sensor 1)
- P0153: Universal heated exhaust gas oxygen sensor – Circuit slow response (Bank 2 Sensor 1)
- P0172: System too rich Bank 1
- P0175: System too rich Bank 2
- P008A: Low pressure fuel system – Pressure is too low
- P2279: Intake air system leak
- B1b01: Key transponder
- B1163: Left mirror heater output
- B1081: Left temperature damper motor
- B10C1: Front left unlock pull switch
- B10C3: Front right unlock pull switch
- High-pressure injectors replaced by dealer.
- Fuel pump replaced in shop, unrelated to current issue.
Other OBD2 Codes + Test Results
Mechanic suggestions
- Reset adaptations after fuel pump replacement.
- Check fuel rail pressure sensor if P008A fault persists.
- Verify fuel pressure in the vehicle.
- Don’t worry about U or B codes unless related symptoms occur.
Final fix
- Reset adaptations and cleared codes. No further issues reported by the customer.
Case #3: Ford
Vehicle information 2013 Ford F-550 Super Duty Lariat 6.7L
Issue + repair history
- Hesitation and low power condition.
- Rear filter found debris, fuel tank rusted with debris.
- Replaced both filters with Motorcraft ones.
- Cleaned out fuel lines.
- Sent fuel tank for coating.
Other OBD2 Codes + Test Results
- P0087: Fuel rail/system pressure low- bank1
- P008A: Low pressure fuel system pressure- too low
Mechanic suggestions
- Check the pickup screen/sock on the sender unit for debris.
- Consider using a piece of quality fuel hose as a workaround for pickup issues.
- Verify proper installation of primary fuel filter O-ring and cap.
- Ensure the fuel filter housing is not sucking air due to over-tightening.
Final fix
- Replaced both filters, cleaned fuel lines, and coated the fuel tank. Confirmed no pickup screen on the sender unit. No further issues reported.
How to diagnose P008A
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Brief Explanation |
|---|---|
| Inspect the fuel filter and housing | Check for leaks, damage, or clogging that could restrict fuel flow. |
| Check the fuel pump | Ensure it’s providing the correct pressure and volume to the engine. |
| Examine fuel lines | Look for leaks, cracks, or damage that could lead to pressure loss. |
| Test the fuel pressure sensor | Verify it’s accurately measuring fuel pressure and not sending false signals. |
| Consult Identifix and TSBs | Look up any manufacturer-specific advice or known fixes for the P008A code. |
In the discussed service cases, addressing the P008A code involved a thorough examination and repair of the fuel system’s low-pressure components. This included replacing damaged or clogged fuel filters, repairing fuel filter housings, resetting system adaptations, and ensuring no leaks or debris were present in the fuel lines or tank. These measures were effective in resolving the issues and restoring normal vehicle operation.
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko