What it means
The control pilot charging ventilation switch reports a circuit high condition. Charging ventilation requirement signal compromised (used for indoor charging).
At a glance
- Usually lights the check-engine light
How it works
The control pilot charging ventilation switch tells the charging system whether its ventilation condition is satisfied. This code sets when the module detects a signal higher than expected, which can result from a short to voltage or an open switch circuit and can disrupt charging authorization.
Common causes
Most likely first.
- Charging ventilation switch circuit shorted to voltage
- Open or faulty switch circuit component
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Save freeze-frame data and check charging live data for the ventilation switch signal and reported state when the high condition was detected.
- Inspect the switch connector and harness for corrosion, backed-out pins, broken wires, or contact with a voltage source.
- Check whether operating the ventilation switch changes its reported state, following the manufacturer’s service information.
- With the charging circuit safely isolated, test for an open switch circuit or a short to voltage using the manufacturer’s procedure.
- Compare connector and circuit measurements with the manufacturer’s specification before suspecting the charging control module.
Common fixes
- Reseat or clean a loose or corroded ventilation switch connector.
- Repair wiring shorted to voltage or an open in the switch circuit.
- Replace the ventilation switch if it fails its specified operation test.
- Repair or replace the charging control module only if the switch and wiring test correctly.
Can I keep driving?
Driving is generally possible if there are no other warnings, but charging may not start or may be interrupted. Do not bypass the ventilation signal or depend on a charge session until the fault is repaired.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.