The EVAP monitor detected leakage smaller than a large-leak threshold, which makes test setup and stable sealing especially important.
Why this matters
A trouble code reports a monitored result. It narrows the system and test conditions, but it rarely names the failed part by itself.
Evidence to capture first
- Fuel level and ambient enable criteria
- Pressure-sensor zero and response
- Purge and vent sealing plus smoke movement at caps, valves, lines, and tank fittings
A disciplined path
- Confirm the monitor conditions and avoid testing a recently refueled hot tank
- Verify valve sealing before searching every hose
- Use low-pressure smoke and adequate observation time
- Recheck decay or monitor completion after repair
Decision point
The repair is supported when the failed circuit, mechanical condition, or monitored response is measured and the original monitor can run without the fault returning.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.
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