Faulty inverter voltage sensor or internal sensing circuit in the inverter assembly; Open circuit or short to voltage in the sensor signal or reference wiring; Corroded, loose or damaged connector terminals at the inverter or control unit; Fault in the sensor supply or ground, giving a skewed reading; Faulty hybrid or motor control unit input circuit; Outdated control unit software, only where the manufacturer has issued a fix for this code on that model.

P0D30

Drive Motor A Inverter Voltage Sensor A” Circuit High.

Generic
Powertrain
Generic code
High severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
D: AreaReserved
30: FaultThe specific fault in that area

What it means

P0D30 is a generic powertrain code for the inverter voltage sensor circuit for drive motor A reading too high. The hybrid or electric vehicle control unit has seen a signal voltage from the sensor that is above the expected range, which points to a sensor, wiring or control unit input fault rather than a genuine over-voltage. Exact sensor location and monitoring strategy depend on the vehicle and the manufacturer.

Symptoms

Hybrid or EV system warning light on the dashboard
Malfunction indicator lamp illuminated
Reduced power or limp mode
Vehicle in ready mode refuses to start or drops out of ready
Reduced or disabled electric drive assistance
Poor efficiency or unusual engine running on hybrids

Possible causes

Faulty inverter voltage sensor or internal sensing circuit in the inverter assemblylikely
Open circuit or short to voltage in the sensor signal or reference wiringlikely
Corroded, loose or damaged connector terminals at the inverter or control unitpossible
Fault in the sensor supply or ground, giving a skewed readingpossible
Faulty hybrid or motor control unit input circuitrare
Outdated control unit software, only where the manufacturer has issued a fix for this code on that modelrare

How to diagnose

Read all stored and pending codes with freeze frame data, noting vehicle state, speed and high voltage readiness when the code set, and check for related inverter, motor or high voltage battery codes
Check for manufacturer service bulletins and software updates relevant to the model and code
Visually inspect the low voltage wiring and connectors to the inverter for chafing, water ingress, corrosion and bent or pushed-back pins; do not touch any orange high voltage cabling unless trained and qualified
Check the 12 V battery condition and charging, as low or unstable supply can upset sensor readings
Use live data to compare the inverter voltage reading with the high voltage battery voltage at key on and in ready mode
Following the manufacturer procedure, and with high voltage isolation carried out by a qualified person, test the sensor supply, ground and signal for open circuit or short to voltage
Wiggle test the harness with live data running to find intermittent faults
Clear the code and road test to see if it returns, then recheck live data

How to fix

Repair or replace damaged wiring in the sensor circuit
Clean or replace corroded or damaged connectors and terminals
Replace the inverter assembly or sensor if it is confirmed faulty, as per the manufacturer's procedure
Restore a good sensor supply and ground connection if found faulty
Replace or repair the control unit only after wiring and sensor have been proven good
Apply an updated control unit calibration if the manufacturer lists one for this fault

Can I keep driving?

High severity

Avoid driving the car beyond what is needed to reach a workshop, as the hybrid or electric drive system may cut out or lose power unexpectedly. Have it checked promptly by someone trained in high voltage systems.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.