Code P0A2D ‘drive motor A’ temperature sensor circuit high?

Tiny
YGBNICKS
  • MEMBER
  • 2008 TOYOTA PRIUS
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Did a motor swap on a Prius, runs fine now but has code P0A2D. I checked the harness/connector going to the temperature sensor and it’s plugged in but showing code. Do I have to replace the whole transmission module?
Saturday, May 3rd, 2025 AT 9:21 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,708 POSTS
I would check the coolant in the inverter system, and make sure the coolant pump is running. If you have air in the system, it will set this code, the temperature sensor is built into the large electrical motor inside the transmission. Recheck the electrical connector at the transmission to make sure none of the wires have pulled out and that there is no corrosion on the terminals.

P0A2D - Drive Motor "A" Temperature Sensor Circuit Range/Performance

Can I ask if this problem was present before the work was done? Here is where you can check the coolant level. Check out the images (below).
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
+1
Sunday, May 4th, 2025 AT 12:06 PM
Tiny
YGBNICKS
  • MEMBER
  • 2 POSTS
The problem was not present before, I checked the connection on the no. 1 temperature sensor and 2 of the wires were pulled out of the connector. Going to fix that and see if that fixes!
Thank you very much for the fast reply and amazing advice!
Was this
answer
helpful?
Yes
No
Tuesday, May 6th, 2025 AT 11:16 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,708 POSTS
You are welcome, if the wiring has pulled then it sounds like you may have found the problem, please let me know if that fixes it :)
Was this
answer
helpful?
Yes
No
Thursday, May 8th, 2025 AT 9:31 AM

Please login or register to post a reply.

Related Coolant Temperature Sensor Content

Coolant Temperature Sender Replacement
VIDEO
Coolant Temperature Sender Replacement
Instructional repair video
Coolant Temperature Sensor Symptoms
GUIDE
Coolant Temperature Sensor Symptoms
An automotive engine coolant temperature sensor, (ECT) sensor, or sometimes called a cylinder head temperature sensor is used to generate feedback information to the PCM...