ABS, VSC, RED TRIANGLE, ((!)) light on, CODE: P3009

Sounds the combination meter (speedometer) is failing, you can perform a cheap DIY fix (threads and videos abound), or buy a lifetime warranty replacement part at Prius Speedometer Replacement

Regarding the DTC P3009, you may want to upgraded to a hybrid compatible OBD2 scanner that can offer subcodes. Many use a mini-vci cable and techstream (dealer tech software) for retrieving the additional subcodes (INFs or detailed codes).

DTC P3009 has five (5) related detailed codes (INFs), knowing an INF can further diagnose the issue and potentially save time and money.

Here is the workup for DTC P3009 (notice the five subcodes or INFs): 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/3009526.pdf

 

check the 12v health

 

Unless Dr Prius had a major update recently, it may not read 'subcodes', aka INFs or 'detailed codes'.

The DTC you posted, P3009 has five (5) possible INFs, knowing the INF for a particular DTC (P3009 in this case) can be very helpful.

If you can't afford a mini-vci cable, then go through the workup for DTC P3009 (below) one step at a time until something stands out.

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/3009526.pdf

Or just go with your initial workup that there is a HV leak in the case, and clean, repair or replace the relate parts as needed.

 

They are not great, you might be needing a new battery, or if it has been recently replaced, it definitely needs some love from a battery charger. Get that taken care of before proceeding any further.

FYI, P3009 is a Gen 1 code, in the Gen 2, like yours, the code for an HV isolation fault is P0AA6. So something is a bit hokey with what you are seeing.

 

what should a 12v battery measure?

 

@dolj

I don't currently recall exactly where, but I have read a document that states some early Gen 2s still used the P3009 code instead of the P0AA6. I was researching it because I ran across a 2004 with a P3009.

 

Found it:

Factory Service Bulletin EG017-05

2004–2005 Toyota Prius Factory Service Bulletin OBDII Code P3009 | AutoCodes.com

 

It depends on why the question's being asked.

To someone wondering whether a battery is fully charged, the answer is a shade over 12.7 for a flooded lead-acid battery, a bit higher for an AGM I'm told. There's a bit of dependence on temperature; for the obsessive, there are charts.

To someone wondering "where do I start with diagnosing this car?", a Gen 2 manual will say to confirm it's 10 to 14, or otherwise charge or replace it before proceeding. A Gen 3 manual will say 11 to 14.

 

Interesting, thanks for that.

 

You might try using an emulator like Oracle VM VirtualBox or https://www.winehq.org/

VB will require a windows OS, XP or greater.

 

The dark dash is a separate issue from the high voltage leak.

You have already done a fine job of trouble shooting this problem. Bisco tells everyone the problem is the 12 volt battery despite it never being true. Sub codes are great but they will only confirm what your test has already shown. Here is another easy test for testing the HV battery for a high voltage leak. Wear gloves and use just one hand while doing this test.

Clearing the codes will allow your car to start and run. This is a temporary fix.

 

... as well as VMWare Fusion, Parallels, or even the built-in Bootcamp will all work.

Probably not the highest priority at the moment, but if you need Techstream in the future ...