P008B Fault Code

P008B OBD-II Trouble Code Short Description

Low Pressure Fuel System Pressure - Too High

What does trouble code P008B mean?

When the fault code P008B appears in a car, it indicates a problem with the low-pressure fuel system pressure being too high. This can be caused by various issues such as a faulty fuel pressure regulator, a clogged fuel filter, a malfunctioning fuel pump, or a problem with the fuel pressure sensor.

To resolve this issue, it is recommended to:

  1. Inspect the fuel pressure regulator and replace it if necessary.
  2. Check the fuel filter and replace it if it is clogged.
  3. Test the fuel pump to ensure it is functioning correctly and replace it if needed.
  4. Verify the readings from the fuel pressure sensor and replace it if it is faulty.

It is crucial to address this fault code promptly as high-pressure fuel system pressure can lead to engine performance issues, reduced fuel efficiency, and potential damage to the engine components. Regular maintenance and timely repairs can help prevent further complications and ensure the proper functioning of the vehicle.


What are the symptoms of the P008B code?

  • Engine misfiring
  • Rough idling
  • Reduced fuel efficiency
  • Check engine light illuminated
  • Potential drivability issues such as lack of power


What causes the P008B code?

P008B - Low Pressure Fuel System Pressure - Too High

  • Faulty fuel pressure sensor
  • Clogged fuel filter
  • Malfunctioning fuel pump
  • Fuel pressure regulator issues
  • Wiring or connector problems
  • ECM/PCM software issues

Possible Solutions

How to fix P008B?

To fix the P008B fault code on cars indicating Low Pressure Fuel System Pressure - Too High, follow these steps:

  1. Check for any clogs or restrictions in the fuel lines.
  2. Inspect the fuel pressure regulator for proper functioning.
  3. Verify the fuel pump is delivering the correct pressure.
  4. Evaluate the fuel injectors for any issues.
  5. Ensure the fuel filter is clean and not causing a restriction.
  6. Perform a thorough inspection of the fuel system components for any leaks or damage.

If the issue persists after checking these components, it is recommended to seek professional assistance to diagnose and repair the problem effectively.