P2440

AIR System Switching Valve Stuck Open Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–78 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Unstable engine operation at idle
Unusual noises from the AIR valve area

Causes

Mechanical jamming of the AIR valve in the open position
Valve control circuit malfunction
Open or short circuit in wiring harness
Failure of the solenoid valve
Problems with the engine control unit

How to Fix

Check the electrical circuit of the valve for open circuit and short circuit.
Test valve coil resistance
Inspect the mechanical part of the valve for sticking
Replacing a faulty AIR valve
Resetting the error and checking the system operation after repair

Related codes

P2441 P2442 P2443