P2E68

System Too Lean During Cylinder Deactivation Bank 1

Moderate severity

During cylinder deactivation on bank 1, the fuel trim of the active cylinders runs persistently lean. Indicates unmetered air ingress or fuel delivery shortfall.

Common causes

Vacuum leak unmasked during deactivation
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $220-1650
Fuel rail pressure low
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $220-1650
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P2E68 mean?

P2E68 means "System Too Lean During Cylinder Deactivation Bank 1". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2E68?

vacuum leak unmasked during deactivation; fuel rail pressure low — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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