P24F1
Control Module Wake-up Circuit High
The wake-up input reads above the expected range — typically a short to battery voltage. The module sees a permanent wake-up request, never enters sleep mode and drains the battery while parked.
- 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 battery voltageCommon
- Connector pins corroded - high contact resistanceLess likely
- Supply wire pinched against B+ sourceLess likely
Parts involved
- Wake Up Circuit
- Control Module
P24F1 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.