P0A2D: Drive Motor A Temperature Sensor A Circuit High

With an NTC thermistor, a high signal voltage stands for a cold motor, and a voltage close to the 5 V pull-up means the circuit is open. GM sets P0A2D on its 2013 two-mode trucks when the reading falls below -40 °C, Type B over two trips; if the fault is already present at start-up it waits until the motor has warmed up under load for at least 1.5 minutes. The 2011 table uses -41 °C, the 2013 MGU mild hybrid -48 °C with torque above 10 Nm. Typical causes are a broken signal or ground wire, an unplugged connector or an open sensor. Hyundai checks the sensor resistance at the transaxle connector. P0A2C is the low-voltage counterpart. Motor protection is lost, so electric power is limited.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

Hybrid system warning or check engine light
Motor temperature shows about -40 degrees in live data
Electric drive power limited

Most likely causes

Open signal or ground wire of the motor temperature sensor
Connector unplugged or terminal pushed out, often after drive unit work
Thermistor open inside the motor or transaxle
Signal wire shorted to a supply voltage

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

It can trigger limp mode.
It affects emissions.

What each character of P0A2D means

P: Powertrain: engine and transmission
0: Generic code: same on every make
A: Hybrid or air and fuel
2D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0A2D?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0A2D?

The most common causes are: open signal or ground wire of the motor temperature sensor; connector unplugged or terminal pushed out, often after drive unit work; thermistor open inside the motor or transaxle.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.