P2666

Fuel Shutoff Valve B Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Difficulty starting the engine
Unstable engine operation
Reduced engine power
Check Engine Light Is On
Increased fuel consumption

Causes

Fuel cut-off valve B malfunction
Open or short circuit in control circuit
Poor contact in valve connector
Engine control unit malfunction
Corroded contacts or damaged wiring

How to Fix

Check the condition of the fuel shut-off valve B
Check the integrity of the control circuit and the condition of the connectors
Measure valve resistance and compare with standard
Check voltage on control circuit
If necessary, replace the valve or repair the wiring

Related codes

P2665 P2667 P2668