Slight shudder and then triangle- P0A7a code- What is it?

Hey Guys,

I was driving my 2008 w/ 180k and at low speed acceleration (10 mph) i felt a slight shudder and the triangle of death came on. Car drove just fine and when i stopped and checked- it was the P0A7A code. Cleared the code and drove the car home. No other codes shown.

This is the second time that the same things happened. Low speed acceleration--slight shudder and triangle. The first time it happened, the car drove very slow and wouldn't accelerate beyond that. I cleared the codes and for the last 1500 miles, its driven fine. This is now the second time w/ the same issue.

Inverter pump and coolant was changed and i confirmed that it is working fine (i can hear/feel the noise and coolant is moving in the reservoir).

Any ideas on what this could be?

 

I didn't see any subcodes. Is there any special way you're supposed to access those? I have a run of the mill obd

 

Hey Guys,
So i got the triangle again and this time i ran techstream to identify it.

It's the P0A7A-325 subcode. Any idea what this could be?

The issue is always the same...slight shudder at low speed acceleration and then i get the triangle...car still works just fine. Mileage has been 4-5 mpgs lower than before as well...

thank you so much!