Codes P0605 & P050E

I have a 2011 v6
I just recently got my car tuned on e85 by my street tuner i have no muffler resonator and a cold air intake.
When I got my tune the codes P0605 and P050E popped up sometimes when i idle my car idles rough and when i turn the ac on my car idles rough. When I shift to park or neutral it idles at like 1k then goes to 1.2 and back down and up over and over.
The codes is related to the PCM how do i diagnose this

P0605 is Internal Control Module Read Only Memory (ROM) Error

P050E is Cold Start Engine Exhaust Temperature Out of Range

What mods do you have? Is it a flash tune or a hand held tuner?

Find a better tuner. They missed the first step in writing a tune.

My tuner diagnosed it was the torque converter

Arule2001 said:

My tuner diagnosed it was the torque converter

Click to expand...

Be careful with that diagnosis. Torque Convertor will generally give a P0700 series codes.

86GT351 said:

P0605 is Internal Control Module Read Only Memory (ROM) Error

Click to expand...

This code is set because the tune has been altered.
1st step in tuning is to address that code.

How can a faulty torque converter cause a high idle? It cannot.

Again, Find a tuner who knows what they are doing.

Juice said:

This code is set because the tune has been altered.
1st step in tuning is to address that code.

How can a faulty torque converter cause a high idle? It cannot.

Again, Find a tuner who knows what they are doing.

Click to expand...

Correct. If anything it would lower the idle if it is locking up improperly.