I'm getting P0A4B P0B42 I'm going to have to remove the battery tomorrow and check the harness and module for corrosion these are the only codes pulling Posted via the PriusChat mobile app.
Are you using techstream to check the above DTCs on this gen2? Here is the work up for DTC P0A4B with INF 253 : 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/Repair%20Manual/04pruisr/05/21bpm/0a4b253.pdf
Just pulled the battery cover checked all cells and harness has very little corrosion but functioning...... now the fact of the matter it's the inverter ecu and luckily I have another Posted via the PriusChat mobile app.
Cleared one code changing the inverter still getting P0B42 any ideas other than the harness being corroded battery packs all showing 8.5volts Posted via the PriusChat mobile app.
It is block 2 low voltage p0b42 block b weak voltage but I'm debating that the harness itself is faulty due to the cells being the same voltage as the rest any other ideas I'm always up for the help Posted via the PriusChat mobile app.
I currently do not have tech stream but have been reading on how to buy one and set it up. This car was of course scanned at a dealer and brought to me bc all they wanted to do was throw a new battery and inverter ecu at it I am the only one in my area who will touch a Prius and have rebuilt many battery packs with success this one is just being a pain I have another HV ecu and wiring harness I'm just debating on changing them or just replacing block 2 Posted via the PriusChat mobile app.
Yuengling! I love Yuengling. Whenever im back east I drive to Pennsylvania and buy Yuengling lager from a beverage distributor. I miss Stoney’s too but you gotta go to Pittsburgh for that. And you really need a copy of techstream and at least a mini VCI. You can find older free copies of Techstream online pretty easy and attempt to install it even before you get a mini vci. Google techstream 12.20.018 and see what pops up.
I appreciate it sir thanks for the tip I'm a big yuengling fan it's my Prius headache cure Posted via the PriusChat mobile app.
Still getting P0B42 after replacing block B cells also the dash display currently shows the HV battery is not charging and yes I checked with the cover off manually. I'm stumped any ideas guys all the cells are the exact voltage charged and discharged this is a tough one you can crank and drive the car perfectly no issue other than not charging the HV battery. I'm thinking HV battery computer failure ......also every dash light imaginable is on. I'm about to replace the whole hv battery cut my loses and move on I got 5 atm and this one is costing more time than I'll get in labor. Also on a lighter note the majority of Prius I work on are rebuilt titles Posted via the PriusChat mobile app.
Problem solved it was the smart box and fan easy fix she's getting picked back up this evening Posted via the PriusChat mobile app.
The battery in the picture just below this line is a replacement from Toyota. The giveaway is the extra stickers on the case. I could not make out the date codes on the modules from the picture with the beer. Hope you left all of those newer modules in place.
Sorry to bring up an old thread. I am having a P0B42 code. Slight corrosion in the terminals and got it cleaned up. Toyota tech reassembled and the code still persist. If the smart unit is broken, would techstream be able to pick up the voltage readings of each block? Like the picture i uploaded. Thanks Could u elaborate how the fan and the smart unit is broken?
