OBD-II code · Powertrain (generic, extended)
P2E68 System Too Lean During Cylinder Deactivation Bank 1
During cylinder deactivation on bank 1, the fuel trim of the active cylinders runs persistently lean. Indicates unmetered air ingress or fuel delivery shortfall.
Is it safe to drive with P2E68?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVacuum leak unmasked during deactivation
- PossibleFuel rail pressure low
Symptoms
- Check engine light on
- Rough idle, possible stalling
- Hesitation or hard cold start
- Power loss under load
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Injectors, Deactivation Solenoids, Intake System
Related codes
- P2E6ASystem Too Lean During Cylinder Deactivation Bank 2
- P2E65Engine Coolant Bypass Valve E Stuck/Open
- P2E66Engine Coolant Bypass Valve E Range/Performance
- P2E67Engine Coolant Bypass Valve E Stuck Closed
- P2E69System Too Rich During Cylinder Deactivation Bank 1
- P2E6BSystem Too Rich During Cylinder Deactivation Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.