OBD-II code · Powertrain (manufacturer / generic)
P3449 Cylinder 6 Deactivation Performance
The engine control module has detected that cylinder 6 deactivation does not perform as expected — the actual cylinder behavior does not match the commanded state.
Is it safe to drive with P3449?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyLifter stuck
- PossibleDeactivation solenoid failed
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–10 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cylinder Deactivation Solenoid, Lifter, Oil Control Valve
Related codes
- P3411Cylinder 2 Deactivation Performance
- P3433Cylinder 4 Deactivation Performance
- P3441Cylinder 5 Deactivation Performance
- P3446Cylinder 6 Exhaust Valve Control Circuit Low
- P3447Cylinder 6 Exhaust Valve Control Circuit High
- P3448Cylinder 7 Deactivation/Intake Valve Control Circuit/Open
- P3450Cylinder 7 Deactivation/Intake Valve Control Circuit Low
- P3451Cylinder 7 Deactivation/Intake Valve Control Circuit High
- P3452Cylinder 7 Exhaust Valve Control Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.