Red Triangle, Check Engine, and (!) pulled Tech Stream codes

Which codes (DTCs) did you discover when you "scanned with Tech stream to check for pending" ?

Here is the workup for DTC P0A0F with INF 204, 205, 533 and 534)

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/0a0f204.pdf

 

The snowflake is the icon for "freeze frame" data. That is a snapshot of operating conditions when the code set. It might also contain an "inf" code- or information subcode that can give a more detailed description of the fault.

Posted via the PriusChat mobile app.

 

Here is another (overlooked) workup for DTC P0A0F with INF 238 : 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/0a0f238.pdf

When available, knowing the INF (subcode or detailed code) for a specific OBD2 code (DTC) may help isolate the problem.

 

It's interesting that you got a P0A0D while sitting in the driver seat. That means the car thought a HV Safety Interlock triggered. That should have a subcode 351 if it happened while the car was running, a 350 subcode if the car was stopped.

The 2 safety interlocks are the safety switch on the HV battery, and a shorting plug inside the inverter that connects two contacts when the cover is in place. The other option is there was some electrical transient in that circuit that made the car think that happened.