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Used/Rebuilt ECM (2005 3.6 CTS)


CGNY

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The ECM (or PCM) is programmed with the car's options and VIN. AFAIK, only a dealer with a Tech II can program a PCM to work in your car.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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I like rockauto.com for this type of thing.

ACDELCO Part # 12592124

MODULE,ENG CONT 4 DOORS $341 + $6 S&H

Looks like Amazon shows the ACDelco part for $283+S&H

Bruce

2016 Cadillac ATS-V gray/black

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thanks for the replies, i had a engine code p0202 come up. Along with another which was cylinder 2 misfire. I have a buddy thats a mechanic who took it to another guy who knows GM vehicles very well. He did some kind of test and based on what he came up with deemed that its the ecm. I've read in another forum of a few people having the same issue

Edited by CaseyG
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Code P0202 is the Injector 2 Control Circuit

P0202 would also cause the #2 cylinder to misfire because the injector wasn't working properly.

I don't see how either problem would have anything to do with the ECM being bad...

It sounds to me like there may be a bad wire going to the #2 injector...

A wire may be loose, grounded, shorted..etc..ect..

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A lot of people want to go to the module because it is a big black box. Modules almost never go bad on cars made after about 1990 unless they are popped by mistakes or abuse. Ways to pop a module include, but are not limited to, the following:

  • Hooking jumper cables backward will have a very high probability of popping all the electronics on the car with the dead battery, including some or all the modules and possibly other things like the radio.
  • Using a fast-charger (24 Volts or anything higher than 12 Volts) on a battery that is still in the car with the cables attached will almost certainly blow some or all of the car's electronics, including the PCM, BCM, and just about anything else that is hooked up, including bulbs - even LEDs - and motors.
  • Some terminals of the modules are static-sensitive. Using a voltmeter improperly on wiring harness connectors and terminals that lead to the PCM or other modules can possibly damage the module. This is not likely a way to pop the fuel injector drivers because static-sensitive terminals are usually connectors to sensors but I wouldn't rule it out. If you don't *really* know what you're doing, don't back-probe any wiring harness connector.

If none of these things have happened - or even if they have happened, then look at the injector, the wiring harness, and the connectors first.

Incidentally, changing just about any module means that the module must be reprogrammed at a dealer. This is particuarly true of the PCM and BCM, and is painfully true of the DIM.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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