P009B

Fuel Pressure Relief Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Reduced engine power
Difficulty starting the engine

Causes

Open or short circuit in valve wiring harness
Pressure relief solenoid valve malfunction
Problems with the control circuit relay or fuse
Engine ECU malfunction

How to Fix

Check the integrity of the wiring harness to the pressure relief valve
Check valve resistance (compare with standard)
Check power and ground at valve connector
If necessary, replace the valve or repair the wiring harness
Clear the error and check if it comes back

Related codes

P0087 P0190 P0191