P2677
Air Cleaner Inlet Control Circuit High
Voltage on the air cleaner inlet valve control line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to B+Common
- Open solenoid coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Air Cleaner Inlet Valve
- Solenoid
- Wiring Harness
P2677 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.