Damaged, chafed or corroded wiring in the inverter voltage sensor circuit (short to earth or low-voltage short); Poor connection or water ingress at the sensor or inverter connector; Faulty inverter voltage sensor, or sensor circuit inside the inverter assembly; Low or missing sensor reference supply from the control unit; Low 12 V supply or poor earth affecting the inverter or hybrid control unit; Fault in the hybrid or motor control unit itself, or outdated software where the manufacturer has a known fix.

P0DA5

Drive Motor B Inverter Voltage Sensor A” Circuit Low.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
D: AreaReserved
A5: FaultThe specific fault in that area

What it means

P0DA5 means the hybrid or electric vehicle control unit has seen a signal that is too low from the voltage sensor (sensor A) on the inverter for drive motor B. The reading is below the expected range, which points to a fault in the sensor circuit rather than proving the actual voltage is low. This is a high-voltage system fault, so the layout and the exact sensor location depend on the model and drivetrain.

Symptoms

Hybrid or EV system warning light on the dashboard
Reduced power or limp mode
Vehicle will not go into READY mode or will not move
Engine or motor not assisting as normal on a hybrid
Reduced regenerative braking or poor efficiency
Fault may come and go with vibration or temperature

Possible causes

Damaged, chafed or corroded wiring in the inverter voltage sensor circuit (short to earth or low-voltage short)likely
Poor connection or water ingress at the sensor or inverter connectorlikely
Faulty inverter voltage sensor, or sensor circuit inside the inverter assemblypossible
Low or missing sensor reference supply from the control unitpossible
Low 12 V supply or poor earth affecting the inverter or hybrid control unitpossible
Fault in the hybrid or motor control unit itself, or outdated software where the manufacturer has a known fixrare

How to diagnose

Read all stored and pending codes and the freeze frame data, and note any other inverter, motor, or high-voltage battery codes.
Check the 12 V battery condition and charging, as low supply voltage can cause false sensor faults, and note whether other low-voltage supply codes are present.
Look up the manufacturer's procedure for the model, and follow the high-voltage safety and isolation steps. Only a technician trained in high-voltage systems should go further.
Visually inspect the sensor and inverter wiring and connectors for chafing, heat damage, corrosion, moisture or bent pins.
With the system safely isolated, test the sensor circuit for continuity, short to earth and resistance against the manufacturer's data.
Check the sensor reference supply and signal voltage against specification, then watch the live inverter voltage reading for implausible or low values.
Check for any technical bulletins or software updates for the model that cover this code.
Clear the code after the repair and road test, then confirm it does not return.

How to fix

Repair or replace damaged wiring and restore the circuit to specification.
Clean, dry and reseat the connectors, or replace corroded or damaged terminals and seals.
Replace the inverter voltage sensor or the inverter assembly if the sensor is not serviceable separately, as the manufacturer specifies.
Restore a healthy 12 V supply and earth connections if they are found to be at fault.
Update the control unit software only if the manufacturer lists it as a fix for this fault, or replace the control unit if proven faulty.

Can I keep driving?

Medium severity

The car may still be driven if it runs normally, but fix it soon because it can drop into limp mode or fail to start. If the car loses power, shows a red high-voltage warning or will not go into READY mode, stop driving and get it recovered to a qualified workshop.

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