The evaporative monitor could not create or hold the expected vacuum or pressure, or it detected flow consistent with a large leak.
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 freeze-frame conditions
- Cap or capless seal condition and visible hose damage
- Vent closure, purge sealing, pressure-sensor response, and low-pressure smoke evidence
A disciplined path
- Inspect the service information and system diagram
- Verify capless or cap sealing without forcing parts
- Command or isolate the vent and purge paths as specified
- Apply approved low-pressure smoke and watch both leak location and sensor response
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.
KEEP EXPLORING
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