1971 suburban with E 38 with L96 6l90 P0606

[rossafrica1]

OK , i have researched some ..not a professional tuner.. hopeful i have enough info to help guide me to resolve this issue..

Stock no mods beside the air intake from factory L96 6L90 from a 2017 express put in a 1971 3/4ton suburban. swapped to a E38 and PSI harnesses programmed the ECM and Transmission together.. have a corvette pedal..

I am getting a P0606 reason 22 code MCP reduced power when i am an higher RPMs. PSI said it was the Dorman throttle body , have replaced it with an AC delco gold blade still getting the code.. The wiring harness itself it a BP automotive harness and is new. It only does this at higher RPM or like when I try to pass someone.. I have read that all the operating systems need to be right to have it to function correctly..Do i need to update the OS to a Camaro OS.. have attached a log file.

Aslo resently took the truck on a 3500 mile trip and it only occurred twice but was cautious not to get into higher RPM range to not make it happen. Hopefully i have given enough info.. Thanks to all that can help

ECM: 7E8, CAN, ECM -EngineControl - E38, GM Gen4 V8
VIN: 1GCRCPE01DZ328223 - 2013 Chevrolet Silverado 1500 Work Truck/Fleet/Base, 5.3 L, V8
Programmed State: Fully Programmed
OS: 12653674
Calibration IDs: 12653674, 12649521, 12657315, 12625892, 12620683, 12640911, 12649831, 12649806
Calibration VNs: 00008A18, 000039E5, 00000AB7, 000036F2, 00009D00, 00007E84, 0000BC04, 00005C5B
Basic PIDs: 46
Controller Type ID By OS: 5010

None: 7EA, CAN, TCM -TransmisCtrl - T43, GM A6
OS: 24265260
Calibration IDs: 24265260, 24262476, 24266339, 24262479

[blindsquirrel]

And the tune file...?

TIS lookup shows your segment IDs OK, except for Engine Operation. They picked the one (12657315) that has the note:

New calibraton for use in vehicles located in the Middle East only, with RPO V87, contains enhancements for idle stability improvement. Current calibration should continue to be used to service all other applications.

The standard segment for that is 12649506. But I don't think that is going to be the cause of your problem. Need to see the tune file, always, anytime there is a question like this.

[rossafrica1]

And the tune file...?

TIS lookup shows your segment IDs OK, except for Engine Operation. They picked the one (12657315) that has the note:

The standard segment for that is 12649506. But I don't think that is going to be the cause of your problem. Need to see the tune file, always, anytime there is a question like this.

1971 burb as found 12_3_23_226pm.hpt


sorry hear is ths tune currently in it.
if the VE table and the Maf are not completely tuned would this P0606 happen?

[blindsquirrel]

No. The way this works is there are two processors that do math on the throttle stuff and then they compare their answers. If they come up with different results to the same math problem, you get REP. That can be because something has been changed in the TAC's code/settings (which can't be done using HPT, which mainly leaves someone not doing the initial flashing correctly and leaving behind wrong segments that don't work with the main engine segments), or, someone has changed the settings in the engine's half of the TAC system at Engine > Airflow > Electronic Throttle.

I don't have a 2013 LMG stock file to use for comparison; the 2013 LC9 files I do have are different from yours at > Electronic Throttle. But your file does match for instance 2013 L94. I have no way of knowing if your file has been changed which is what's making it trip out, or if it's supposed to have what's in there.

[blindsquirrel]

Oh, and you will want to turn off Virtual Flex, it only barely works occasionally by accident when everything is 100% stock. If you need flex fuel install a real sensor.

[rossafrica1]

Oh, and you will want to turn off Virtual Flex, it only barely works occasionally by accident when everything is 100% stock. If you need flex fuel install a real sensor.

Ok , if i want to change to a camero OS to get my AC pressure transducer to work.. how do I know what OS is compatible with my Pedal.. is there a site you are looking at or ... you just know that a camero pedal will work with a camero tune..

I am thinking that it is a issue as you say with the segmentss.. PSI converstions was suppose to match the system as they asked specifically what pedal and transmission i was using.. Is is possible to get a used one off EBay that has they correct OS on it.. the city i live in does not have any professinal tuners.. but willing to drive to get it flashed by one if they can download the compatible OS to it.


thanks for all your help i see your name on most of the threads when i search for answers..

[blindsquirrel]

I already put your VIN into the lookup thingie and checked the segment IDs, I think I mentioned that. If it had been programmed wrong the IDs for Engine and Slave Operating System would not have matched, and they do.

I think I would be looking for a stock 2013 LMG file before committing to changing to a Camaro OS.

[blindsquirrel]

PSI said it was the Dorman throttle body , have replaced it with an AC delco gold blade still getting the code..

2017 Express throttle body or 2013 Silverado throttle body?

[rossafrica1]

2017 Express throttle body or 2013 Silverado throttle body?

It?s a 2010-2014 truck style .. it was changed no longer the xpress fan TB one

[blindsquirrel]

Is it the correct throttle body for the VIN shown in the tune file, because that is what has to match.

[rossafrica1]

Yes it is compatible with the 2013 truck as listed in the tune

[blindsquirrel]

What part number is your MAP sensor? Tune file has 94.43/10.34 which is for the early Gen4 sensor, anything in the year range of either the tune file or the donor engine should be 128.20/-0.30.

[Alvin]

1971 burb as found 12_3_23_226pm.hpt


sorry hear is ths tune currently in it.
if the VE table and the Maf are not completely tuned would this P0606 happen?

Do you have the OEM stock file for this before you started modifying it?

There are a few throttle things that can cause a P0606 but most of the time it is just a bad ECM and it is not uncommon.

[rossafrica1]

What part number is your MAP sensor? Tune file has 94.43/10.34 which is for the early Gen4 sensor, anything in the year range of either the tune file or the donor engine should be 128.20/-0.30.

It?s a bosh style 12644228 MAP
And Ls3 style card MAF

[rossafrica1]

The stock file is from the E67 that was in the Chevy express .. I bought e38 and harness with things I was suppose to need to get it to work.

[gtstorey]

It?s a bosh style 12644228 MAP

Should be using 128.20/-0.30.

[kevin87turbot]

Blindsquirrel described the issue perfectly. I've seen the P0606 DTC several times lately. The last one was an E38 that was programmed by BP Automotive. It had a P0606 from day 1. Bill at BP was quite adamant that the issue was caused by the tuner, and that the tuner should easily be able to fix the issue. I just swapped the ECM with a stock one. That fixed the issue.

You can order an ECM from several places already flashed to whatever VIN you need. I've used FlashmastersECM for the last few years.

[blindsquirrel]

But is it a hardware issue or changes that have been made in the Electronic Throttle tables? I don't have a stock file that matches his, a 2013 LMG. It currently has throttle tables that match a L94, but not other LMGs. I can only find a 2013 Tahoe LMG to compare with and all of everything in the OP's file has been changed from that one.

OP vs 2013 Escalade L94:
screenshot.04-12-2023 10.55.28.png

OP vs 2013 Tahoe LMG:
screenshot.04-12-2023 10.55.49.png

[rossafrica1]

Should be using 128.20/-0.30.

changed and tested still throws a p0606 reason 22map new limit.PNG

[gtstorey]

changed and tested still throws a p0606 reason 22map new limit.PNG

Wasn't trying to say that was the cause of P0606. Just something that needed to be corrected.