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.
What P260F means
P260F is a generic OBD-II powertrain code in the emissions group. In plain English: the signal is within electrical limits but doesn’t make sense compared with other readings, so the part or system isn’t performing as expected.
- Check engine light
- Usually on
- Emissions-related
- Yes — can fail inspection
- Limp mode possible
- Not typical
- Drive cycle to clear
- Not required
Get it fixed
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Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Common causes
- 01Internal fault in the monitoring processorMost likely
- 02Software memory corruptionPossible
- 03Module software outdated, reflash may resolveLess likely
Can I drive with P260F?
Generally yes.
This fault is unlikely to affect how the car drives, but it will usually fail an emissions inspection. Fix it when convenient.
Why we rate it low
- Turns on the check engine light
- Emissions-related: will usually fail an OBD inspection
- EVAP leaks rarely affect how the car drives
Severity is our rule-based rating from the code’s flags in OBDex and the system it affects, not an inspection of your car. If the check engine light is flashing, or you notice overheating, low oil pressure, or brake or steering problems, stop driving and get help.
How to diagnose P260F
- 1
Confirm the code and save freeze-frame data
Read the codes with an OBD-II scan tool and note every code, not just P260F. Save the freeze-frame data (speed, load, temperature when the fault set) before clearing anything; it tells you when the fault happens.
- 2
Fix other faults first
If other codes are stored, start with power-supply, sensor-circuit and communication codes. They can cause this code as a side effect.
- 3
Check the gas cap, then smoke-test
Inspect the fuel cap seal and make sure it clicks tight. If the code returns, a smoke test of the EVAP system finds cracked hoses, purge or vent valve leaks.
- 4
Test the likely causes in order
Start with the most likely cause and work down: Internal fault in the monitoring processor; software memory corruption; module software outdated, reflash may resolve. Test before replacing parts.
- 5
Check for recalls and service bulletins
Look up recalls for your exact vehicle with its VIN, and ask a dealer about technical service bulletins (TSBs). Manufacturers sometimes issue software updates or extended warranties for known faults.
- 6
Clear the code and verify the repair
After the repair, clear the code and drive the car under the conditions in the freeze-frame data to confirm it does not return.
P260F repair cost estimate
Estimate, not a quote. Labor times are typical ranges for this code from OBDex, and $125/hr is an assumed rate. Shop rates and labor times vary by vehicle and region. Diagnosis time may be billed separately.
- DIY difficulty
- Hard
- Good DIY job?
- Usually a shop job
Involved testing or major parts. Most owners use a shop.
Parts and systems involved
- EVAP monitor processor
- Control module
P260F FAQ
What does P260F mean?
P260F means “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 P260F serious? Can I keep driving?
We rate P260F as low severity. Generally yes. This fault is unlikely to affect how the car drives, but it will usually fail an emissions inspection. Fix it when convenient.
What causes P260F?
The most common causes, from most to least likely: Internal fault in the monitoring processor; Software memory corruption; Module software outdated, reflash may resolve. Test before replacing parts, because several causes can set the same code.
How much does it cost to fix P260F?
Typical labor is about $190–$500 at an assumed $125/hour shop rate, plus parts. That is an estimate, not a quote: labor times and rates vary by vehicle and region, and diagnosis may be billed separately.
Can I fix P260F myself?
DIY difficulty is hard. Most owners leave this to a shop because it needs involved testing or specialist tools. Always confirm the cause before buying parts.
Will P260F clear itself?
If the fault was intermittent, the warning may go off once the computer stops seeing it, but the code stays in memory. Fix the cause; clearing the code alone doesn’t repair anything.