OBD-II code · Powertrain (manufacturer / generic)
P340A Deactivation/Intake Valve Control Circuit Bank 1
Generic electrical fault on the cylinder deactivation/intake valve control circuit on bank 1. The mechanism that switches off intake valves on selected cylinders cannot be commanded.
Is it safe to drive with P340A?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyDeactivation solenoid failed
- PossibleWiring break or unplugged connector
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cylinder Deactivation Solenoid, Actuator Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.