P2C90

Crankcase Ventilation System - Hose A Disconnected

Moderate severity

The ECM detects that crankcase ventilation hose A is disconnected based on pressure or vacuum signals. Unmetered air ingress and oil mist escape are possible.

Common causes

Hose disconnected at fitting
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $20-220
Hose split or perforated
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $20-220
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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 P2C90 mean?

P2C90 means "Crankcase Ventilation System - Hose A Disconnected". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2C90?

hose disconnected at fitting; hose split or perforated — 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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