Faulty inverter temperature sensor D; Short to ground in the sensor signal circuit; Open or high-resistance connection in the sensor wiring or connector; Damaged or corroded sensor connector pins; Internal fault in the inverter assembly affecting sensor reference voltage; Poor ground connection for the sensor circuit

DTC codes / P0Bxx · Hybrid propulsion / P0BD8

P0BD8Drive Motor Inverter Temperature Sensor D Circuit Low

Q: What does code P0BD8 mean?

Drive Motor Inverter Temperature Sensor D Circuit Low. P0BD8 indicates that the inverter temperature sensor D circuit for the drive motor has reported a voltage below the expected range, meaning the sensor signal is lower than normal. The computer detects this when the sensor return voltage stays under the calibrated minimum for a set time, often indicating a short to ground or an open circuit in the sensor wiring.

P0BD8 indicates that the inverter temperature sensor D circuit for the drive motor has reported a voltage below the expected range, meaning the sensor signal is lower than normal. The computer detects this when the sensor return voltage stays under the calibrated minimum for a set time, often indicating a short to ground or an open circuit in the sensor wiring.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light or service vehicle soon message
Often no symptoms besides the warning light
Reduced power or limp mode if the inverter overheats
Inconsistent or erratic temperature readings on a scan tool
Possible shutdown of the electric drive system in severe cases

Common causes, most likely first

Faulty inverter temperature sensor D
Short to ground in the sensor signal circuit
Open or high-resistance connection in the sensor wiring or connector
Damaged or corroded sensor connector pins
Internal fault in the inverter assembly affecting sensor reference voltage
Poor ground connection for the sensor circuit

How to diagnose and fix it

Connect a scan tool and record the freeze-frame data and sensor voltage reading to confirm the low signal
Visually inspect the sensor connector and wiring for damage, corrosion, or loose pins
Disconnect the sensor and measure resistance across the sensor terminals to check for an open or shorted sensor
Check the sensor signal circuit for a short to ground using a multimeter with the ignition on
Verify the sensor reference voltage and ground circuit integrity at the connector
If wiring and sensor test good, suspect an internal inverter fault and perform manufacturer-specific diagnostics
Replace the faulty sensor or repair the wiring as needed, then clear codes and verify the repair with a test drive

Inverter sensor D low-circuit pitfalls

A low voltage code often results from a short to ground in the signal wire rather than a failed sensor, so inspect the harness for chafing near hot or moving components.
The sensor may share a reference voltage or ground with other sensors; a fault in a shared circuit can set multiple temperature sensor codes simultaneously.
Inverter temperature sensors are sometimes integrated into the inverter assembly and not serviceable separately, requiring replacement of the entire unit.
Intermittent low-voltage codes can be caused by water intrusion into connectors, especially in vehicles driven in wet or humid conditions.
Clearing the code without repairing the underlying circuit may lead to repeated failures and potential inverter overheating damage.

Can I keep driving with P0BD8?

It is generally safe to drive with this code if the vehicle is not in limp mode and no overheating warnings are present, but avoid heavy acceleration or prolonged high-load driving until the fault is repaired. If the vehicle enters reduced power mode or shows overheating alerts, stop driving and seek professional diagnosis.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.