P2618
Crankshaft Position Signal Output Circuit Low
The buffered crankshaft position output is below the expected level. Usually a short to ground on the output line or a failed buffer.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Output wire shorted to groundCommon
- Buffer transistor failedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Control Module
- Signal Output Buffer
- Wiring Harness
P2618 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.