Evaporative Emission Control System Purge Control Valve Circuit
There's an issue with the purge control valve circuit.
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)
The computer is detecting a problem in the circuit that controls the purge valve, which lets fuel vapors escape from the charcoal canister into the engine to be burned off.
What the computer is actually seeing
The Engine Control Module (ECM) monitors the purge valve circuit for voltage and resistance, typically expecting a voltage close to battery voltage (around 12V) when the valve is commanded to open.
What a healthy reading looks like
When the valve is activated, you should see a voltage of approximately 12V at the purge valve connector. Resistance in the circuit should be below 5 Ohms when the valve is closed.
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.
- 11. Check for any visible damage to the wiring and connectors leading to the purge control valve. If any damage is found, repair as necessary.
- 22. Using a multimeter, check for proper voltage at the purge valve connector with the ignition on. Voltage should be around 12V. If not, trace the wiring back to look for breaks or shorts.
- 33. If voltage is correct, test the resistance of the purge control valve. Disconnect the connector and measure resistance across the terminals of the valve. It should be below 5 Ohms. Replace if the reading is higher than 5 Ohms.
- 44. If the valve tests good, check for any fault codes with an OBD-II scanner. Clear the codes and see if the code returns. If it does, consider testing or replacing the ECM.
Common causes
- Faulty purge control valve
- Open or shorted wiring in the circuit
- Bad connector at purge valve
- Failed ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code?
Yes, but the vehicle may have increased emissions and should be repaired soon.
Why did this code come back after clearing it?
This could indicate a persistent electrical issue with the wiring or the valve itself.
Will this affect my vehicle's performance?
It can cause rough idling or poor fuel economy if left unfixed.
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