Hi all,

I decided to throw my scanner on the car and a bunch of codes came up under the OEM Enhanced data. 350 with 206,000k on her.
-P0605
-P0756
-P1870
-P1875 (No clue why a 4WD code would be coming up)
-U1026
-U1024
-U1064
-U1193

I was curious what avenue I should start with in this diag. I was thinking that this could be a possible ground issue. At the moment, there is no drivability issues.
If in the end, the ECM has in fact failed, what does the process look like for reprogramming the new one.... Is a Tech2 needed?

Thanks for the input,
Cole.

 

You could contact a shop that refurbishes vehicle computers and find out what your options are. I tracked down a very frustrating driveability issue on my '97 Corolla that turned out to be a bad ECM. I opened it up and found leaking capacitors. I want to say I paid something like $80+ shipping to have it refurbished.

 

So runs well and no check engine light coming on??

 

If there’s no driveability concerns or check engine light, it’s most likely these codes are all either pending or in history (not active). Without being erased with a scan tool, some codes can take up to 80 ignition cycles to clear.

The P1875 could be setting because the original PCM was replaced with a PCM out of a 4x4.

If you’re concerned or unsure if any of them need diagnosis, erase them, then check for codes again after a few drives. Any codes that return should be addressed.

 

I would go with this suggestion. It is not expensive to have these rebuilt, usually, and that is a lot less misery than trying a buncha other avenues.