What it means
A circuit fault is detected in drive motor A inverter voltage sensor A circuit. The reading may be unreliable.
At a glance
- The engine or gearbox may go into limp mode
How it works
Drive motor A inverter voltage sensor A provides the control system with a voltage-related signal from inverter A, which manages electrical power to drive motor A. The module sets this circuit code when it detects an electrical fault in the sensor circuit, making that reading unreliable.
Common causes
Most likely first.
- Sensor failed
- Wiring or connector fault
Symptoms
- EV/hybrid system warning light on
- Reduced motor power or torque
- Possible limp mode or vehicle shutdown
How to diagnose it
- Scan all hybrid or EV modules and record freeze-frame data and live readings for drive motor A inverter voltage sensor A before clearing codes.
- Compare the sensor reading with related inverter voltage data and the manufacturer's specification to determine whether the fault is electrical or a broader inverter issue.
- With the vehicle made safe according to its service information, inspect sensor A's connector and wiring for damage, loose fit, corrosion, or displaced terminals.
- Check the sensor circuit's reference, ground, and signal wiring using the vehicle wiring diagram and the manufacturer's test procedures.
- If wiring and connections pass their checks, test drive motor A inverter voltage sensor A and replace it only if its output fails the specified tests.
Common fixes
- Reseat and secure the sensor A connector.
- Repair damaged or corroded wiring or terminals in the sensor A circuit.
- Restore a faulty circuit connection or ground identified by testing.
- Replace drive motor A inverter voltage sensor A if it fails the manufacturer's tests.
Can I keep driving?
Reduced motor power or a shutdown is possible, so avoid driving in traffic or on fast roads if the warning or power loss is present. If the vehicle shows a severe hybrid/EV warning, loses drive power, or is at risk of shutting down, stop safely and arrange assistance.
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.