Evaporative Emission Control System Vent Control Circuit Shorted
The vent control circuit in the evaporative emission system is shorted.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Your car's system that controls fuel vapors is detecting a short circuit in the vent control part, which can lead to leaks or increased emissions.
What the computer is actually seeing
The Engine Control Module (ECM) monitors the voltage on the vent control solenoid circuit. A short circuit will show a voltage reading that is significantly lower or higher than expected, typically around 0 volts or battery voltage instead of the usual 3-12 volts.
What a healthy reading looks like
Expected voltage on the vent solenoid circuit should be between 5 to 9 volts when the solenoid is activated.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the fuse for the evaporative emission system. If blown, replace it and retest.
- 2Inspect wiring and connectors for damage or corrosion leading to the vent control solenoid. Repair as necessary.
- 3Using a multimeter, check the voltage at the vent control solenoid connection when the ignition is on. It should read between 5 to 9 volts. If not, check the wiring back to the ECM.
- 4Disconnect the vent control solenoid and check for continuity in the wiring harness. If there's a short to ground or to power, track it down to repair the wiring.
Common causes
- Wiring harness short circuit
- Corroded or damaged connectors
- Faulty vent control solenoid
- Failed ECM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive but emissions will be higher than normal, so fix it soon.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return.
Why might this code show up with other codes?
Related codes often indicate issues within the same system, like leaks or circuit errors.
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