Active drain valve malfunction
The active drain valve is not functioning properly.
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 active drain valve is supposed to open and close at specific times for proper draining of fluids. If it fails, the vehicle may not drain as it should, possibly leading to fluid buildup or improper operation in the system.
What the computer is actually seeing
The engine or vehicle control module detects that the active drain valve's position sensor is sending signals that indicate an issue, such as it being stuck open or closed.
What a healthy reading looks like
When the valve is commanded to close, the position feedback should read between 0-0.5 volts (closed). When commanded open, it should read between 4.5-5 volts (open).
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 the wiring and connectors at the active drain valve for damage or corrosion. Make sure they are secure. IF OK, proceed to step 2.
- 22. Measure the voltage at the active drain valve connector with the key ON (engine OFF). You should have battery voltage present (around 12-14V). IF NOT, check the fuse and wiring back to the control module.
- 33. With the valve connected, use a scan tool to command the valve to open and close. Monitor the position sensor feedback. IF feedback doesn't change as expected, the valve may be faulty. Proceed to step 4.
- 44. Remove the active drain valve and manually test its operation. IF it does not open and close smoothly, replace the valve.
Common causes
- Wiring issues or shorts in the circuit
- Faulty drain valve
- Bad position sensor
- Contaminated or blocked drain line
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
Yes, it's drivable, but you may experience fluid issues that could lead to further damage over time.
Will this code come back after clearing it?
If the underlying issue isn't fixed, the code will likely return after clearing.
What happens if I ignore this fault?
Ignoring it may lead to fluid buildup or other components failing due to improper drainage.
Working a real vehicle right now?
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