P340A

Deactivation/Intake Valve Control Circuit Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Deterioration in acceleration dynamics
Increased fuel consumption
Unstable engine operation at idle
Possible misfire in the first row of cylinders
Check Engine Light Is On

Causes

Open or short circuit in control circuit
Deactivation solenoid valve malfunction
Mechanical damage to the valve deactivation mechanism
Wiring Harness Problems
Engine ECU malfunctions

How to Fix

Check the integrity of the control circuit
Test the system solenoid valves
Inspect the intake valve deactivation mechanism
Check connections and wiring harness
If necessary, replace faulty components

Related codes

P340B P340C P340D