Error code P0A4D

Welcome back to PriusChat!!

How are you reading the OBD2 codes, and did you retrieve any INFs (three digits, like 255) ?

Here is the work up for a gen2 P0a4d :

https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/21bpm/0a4b253.pdf

 

I had this error, as well as P0a4c. I replaced the 12v battery based on what some other threads suggested, but that didn't fix the problem. Had it towed to a mechanic, who found that an animal had chewed through some wires. Easy fix for them! The workup posted by SFO seemed spot on.