The P0A2D error code reads “Traction motor A temperature sensor high”. Often, in programs working with an OBD-2 scanner, the name may have the English spelling “Drive Motor” A “Temperature Sensor Circuit High”.
Technical description and explanation of the P0A2D error
OBD-II DTC P0A2D is generic and is defined as “Traction motor A temperature sensor signal high”. In this case, the error indicates the specific circuit with which the problem occurred.
The traction motor is installed on electric vehicles and hybrid vehicles. In hybrid vehicles, the electric motor works in tandem with the combustion engine.
Depending on the selected operating mode and the scheme of the car, an electric motor, a gasoline engine or two engines are turned on at the same time. This is accomplished by a circuit in the control module that estimates the required power at a given time.
To maintain normal operation, the motor must operate within certain temperature limits. These parameters are monitored using temperature sensors installed in the traction motor.
This vehicle malfunction is related to the traction motor “A” temperature sensor circuit. P0A2D will set when the PCM detects a high motor temperature sensor circuit.
This code is applicable to vehicles with hybrid drive, it is not used on vehicles with conventional engines.
The primary symptom of a P0A2D error for a driver is a MIL (Malfunction Indicator Light) illuminated. It is also called Check engine or simply “check is on”.
They can also manifest as:
- The control lamp “Check engine” on the control panel will light up (the code will be written into memory as a malfunction).
- Hybrid malfunction indicator lamp illuminates.
- The traction motor may not work.
If a P0A2D error occurs, the traction motor may not be running, so this code should be treated as serious. It’s best to fix this error as soon as possible.
Reasons for the error
A P0A2D code may indicate that one or more of the following problems have occurred:
- The traction motor temperature sensor is out of order.
- Open or short circuit in wire harness.
- Loose or damaged connectors.
- Poor grounding is a common cause.
- Blown fuse or fuse link.
- The traction motor is defective.
- Sometimes the cause is a faulty PCM or a programming error.
How to eliminate or reset the P0A2D trouble code
Some suggested steps to troubleshoot and fix the P0A2D error code:
- Read all stored data and error codes with an OBD-II scanner. To find out when and under what circumstances the P0A2D error occurred.
- Clear the error codes from the computer memory and test drive the vehicle to see if the problem reappears.
- If the error code reappears, visually inspect the electrical wires and connectors.
- Repair or replace any defective wires and connections as necessary.
- Check the traction motor temperature sensor.
- The temperature sensor of the motor-generator is often built into the winding, therefore, if it fails, it will have to be replaced with the winding.
- If there are no defects, check the PCM itself and its software.
Diagnostics and problem solving
Other errors may sometimes be present when DTC P0A2D occurs. Associated codes usually refer to abnormal system voltages. As well as performance range mismatch codes that may apply to different sensors.
If there are no additional codes, it is necessary to visually check all the wiring associated with the traction motor temperature sensor. Repair or replace as necessary to ensure efficient load transfer.
If there are no visible signs of a short circuit or other damage, use a volt-ohm meter to check the resistance and grounding. Replace as necessary so that all electrical values are within the manufacturer’s specifications.
If all wiring has been checked, the traction motor temperature sensor itself must be checked with a multimeter. If the cause of the P0A2D error turns out to be in it, then the repair will be expensive, since the sensor is often built into the winding of the motor generator.
On what cars is this problem more common?
The problem with the P0A2D code can occur on different machines, but there are always statistics on which brands this error is more common. Here is a list of some of them:
- Lexus (Lexus 400h, 450h)
- Toyota (Toyota Camry, Prius)
Other errors can sometimes be found with DTC P0A2D. The most common are the following: P0A2A, P0A2B, P0A2C, P0A2E, P0A2F.