What it means
The control module detects voltage below the expected range in the control pilot indicator control circuit. This indicates a fault in that monitored circuit; the effect on charging depends on the vehicle.
At a glance
- Usually lights the check-engine light
How it works
The control pilot indicator control circuit operates an indicator associated with the vehicle’s charging system. The control module monitors the circuit voltage, and this code sets when it is lower than the expected range, such as from a short to ground or a fault in the indicator or connector.
Common causes
Most likely first.
- Wire shorted to ground
- Lamp internal short
- Connector pins corroded - high contact resistance
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Record freeze-frame data and check charging status and live control-pilot indicator circuit data to confirm when the low reading occurs.
- Inspect the indicator and its connector for corrosion, pushed-back pins, moisture, or damaged wiring.
- Check the circuit for a short to ground and inspect the harness for chafing or pinched sections.
- Test the indicator for an internal short and check connector contact condition against the manufacturer’s procedure.
- Measure circuit voltage and continuity under the specified test conditions and compare with the manufacturer’s specification.
Common fixes
- Repair wiring shorted to ground in the control pilot indicator circuit.
- Clean or repair corroded, loose, or pushed-back connector terminals.
- Replace the indicator if it has an internal short.
- Repair an identified circuit fault and verify that charging and the indicator operate normally.
Can I keep driving?
The fault may prevent charging from starting or cause an interruption, though its effect depends on the vehicle. Do not rely on the indicator alone to confirm charging; stop using the charging equipment if charging behaves abnormally.
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.