P24F0
Control Module Wake-up Circuit Low
The wake-up input on the control module reads stuck low — usually a short to ground or a permanently asserted wake signal. The module either keeps waking up unnecessarily and drains the battery, or it cannot distinguish a real wake event from the stuck low level.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Wake-up wire shorted to groundCommon
- Door, hood or terminal switch stuck closedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Wake Up Circuit
- Control Module
P24F0 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.