What it means
The charging stop switch reports a circuit high condition. Charging termination cannot be reliably commanded by the operator.
At a glance
- Usually lights the check-engine light
How it works
The charging stop switch provides the charging control system with the driver's request to end a charging session. The control module monitors the switch signal and sets this code when it detects a high signal where the stop-switch circuit should not remain high, making the stop request unreliable.
Common causes
Most likely first.
- Signal wire shorted to B+
- Switch stuck active
- Connector pins corroded - high contact resistance
Symptoms
- Charging may not stop when requested
- Charging may stop unexpectedly or require manual termination
How to diagnose it
- Use a scan tool to record freeze-frame data and watch the charging stop-switch status while operating the switch, to see whether the module consistently recognizes the stop request.
- With charging safely stopped, inspect the stop switch and its connector for a switch stuck active, corrosion, loose pins, or damaged wiring.
- Check whether the signal wire is shorted to battery positive and whether connector contact resistance is excessive, following the manufacturer's wiring information.
- Test the stop switch and circuit response in both released and pressed states against the manufacturer's specification.
- Repair any wiring or connector fault, then clear the code and verify that the module recognizes a stop request and charging terminates.
Common fixes
- Clean and secure corroded or loose stop-switch connector pins.
- Repair a signal wire shorted to battery positive.
- Replace a stop switch that remains active or fails its circuit test.
Can I keep driving?
Do not rely on the stop switch to end charging; monitor the session and use the vehicle or charger’s approved termination method. Stop charging if it cannot be ended safely, since continued charging may create a safety risk.
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.