OBD-II code · Powertrain (generic, extended)
P260F EVAP System Monitoring Processor Performance
The dedicated EVAP monitoring processor (often a small auxiliary CPU inside the engine controller or a separate module) does not pass its self-test or runs out of step with the main monitor logic.
Is it safe to drive with P260F?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInternal fault in the monitoring processor
- PossibleSoftware memory corruption
- Less likelyModule software outdated, reflash may resolve
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Monitor Processor, Control Module
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.