P01C4
Fuel Pressure Sensor A Circuit Range/Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check the fuel pressure sensor for any physical damage or signs of malfunction.
- Inspect and clean the fuel pressure regulator to ensure proper fuel pressure control.
- Verify the fuel pump operation and pressure to ensure it is delivering the correct amount of fuel.
- Check for any leaks or blockages in the fuel lines that may be affecting the fuel pressure.
- If necessary, replace the fuel pressure sensor or the fuel pressure regulator to resolve the circuit range/performance issue.
Common causes
Most likely first
- Faulty fuel pressure sensor
- Clogged or dirty fuel injectors
- Weak fuel pump
- Fuel filter clogged or restricted
- Faulty fuel pressure regulator
How to diagnose & fix
Work through it in order
- Stalling or rough idling
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