Question about 1999 Chrysler LHS

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How to replace a ecm

My car stopped in the middle of the street. I took it to the repair shop and I believe it could be the ECM? Only because I had a dianostic a month ago and that was one problem that came up. How do I replace the ECM myself and where is it located in my car?

Posted by Willow Ridge on


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Jeff's Garage

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  • 118 Answers

It should be on the drivers side firewall, are you sure you don't have a loose connection somewhere? Reason I'm asking is that ECM'S rarely go bad and if they do they don't just start working again.

Posted on May 31, 2014


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Howard Lester

  • 341 Answers

SOURCE: Engin Control Module (ECM)

It should be something you can do yourself. Most pcm's are located on the inner fender with two or four screws holding them on and two to four wire harness plugs going into them. The ECM is not the first place I would look for any problems.PCM failure is very rare.Much better chance of input power problems rather than the actual ECM itself.

Posted on Dec 28, 2008



  • 137 Answers


you need the new controller initialized from the dealer or a garage that has a DRB.

Posted on Jan 19, 2009


Jerry Koski

  • 443 Answers

SOURCE: key replacement and reset ecm

is key a security chip key ?? if so use only the one made for that car .. or change out the ignition switch with new key also

Posted on Jan 26, 2009


  • 16 Answers

SOURCE: 2002 chrysler sebring LXI coupe would not start 2

They have either left a wire to the starter unhooked or they have blown a fuse or fuselink

Posted on Jun 16, 2009


  • 957 Answers

SOURCE: replaced the ecm now the car wont start.

Did the new ECM come from the dealer or a junk-yard?
I ask because if it came from the dealer it would need the prom installed and it also may need additional programming and/or updates. But do recheck your connections. You may have accidentally bent a pin or broke a wire.

Posted on Apr 28, 2010

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