P3000 and P0AAC code on Prius 2005

p3000, or p0300?

you need tech stream and the sub codes. start with a good look for corrosion inside the hv battery.

you might need plugs, injectors or coils,

or maybe just a new car

how many miles/km on her? is the hybrid battery original, replaced with oem or rebuilt?

 

This problem is often related to voltage sensor harness corrosion where it plugs into the hybrid battery ECU... So check that first.

 

P0AAC is to do with HV (hybrid vehicle) battery temperature.

The intake air temperature sensor is provided on the HV battery assembly. Its resistance value varies with the changes in the intake air temperature. The characteristics of the intake air temperature sensor are the same as the battery temperature sensors.

The battery ECU uses the signals from the intake air temperature sensor for adjusting the airflow speed of the battery blower.

P0AAC is set when the temperature detected by the intake air temperature sensor is lower than standard (open) or higher than standard (short) (1 trip detection logic).

HINT: After confirming DTC P0AAC, then, confirm the temperature of the intake ambient air to the battery pack by checking "BATT INSIDE AIR". You will need the use a scanner like Techstream to look at live data of the battery ECU.

You might also want to check the operation of the HV battery cooling fan and that it is clean. Also, check the entire air path of the battery cooling is clear of any obstructions that might hamper cooling.