P25A5
Fuel Mode Select Switch Performance
The fuel mode select switch is electrically intact, but its state does not match operating conditions — switched to gas while gas tank is empty, or fast toggling. The ECM rejects the request to avoid stalling.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Switch contact bounceCommon
Parts involved
- Fuel Mode Switch
P25A5 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.