P340BDeactivation/Intake Valve Control Circuit Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P340B mirrors P340A for bank 2, the bank that does not contain cylinder 1, so it only applies to V or boxer engines. It marks an electrical fault in a control circuit that switches the intake valves of that whole bank at once. No manufacturer documents this code publicly. The widespread V8 systems put the deactivating cylinders of bank 2, cylinders 4 and 6 on GM and Chrysler engines, on their own solenoids and report them as P3425 or P3441. Honda's VCM V6 watches bank 2 via a rocker arm oil pressure switch and stores P3497. CARB asks for circuit checks of such outputs. The bank 1 counterpart is P340A, the bank 2 exhaust circuit P340D, the function code P341B. Usually the only effects are the lamp and lost economy.
- What you may notice
- Check engine lamp on
- Engine runs on all cylinders permanently
- Slightly higher fuel consumption
- Likely causes
- PossibleChafed, open or shorted wire to the bank 2 actuator
- PossibleOil or moisture in the bank 2 actuator connector
- PossibleDefective bank 2 intake deactivation actuator coil
- RareEngine control module output stage fault
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.