What is the danger of not replacing the Powertrain Control Module?

VPK

MEMBER
2002 TOYOTA SIENNA
16,700 MILES

My check engine light just came on today. I was expecting something minor and was told I needed to replace the Module engine control and if that doesn't work I might have to then replace converter and center pipe. What happends if I don't replace the Powertrain Control Module will the computer just die and the car stop? I'm not having any obvious symptoms except the idle is a little off.

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

First of all, you need a second opinion. It sounds like they are guessing.
You need to give us the code so we can further help you.

Roy

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Thursday, October 13th, 2011 AT 1:20 AM

VPK

MEMBER
2 POSTS

My code was P0420 but due to some Technical Service Bulletin the one service rep said I needed to replace my Engine Control Module (10/19/2005TSB) which would cost $1561.83. Then if that didn't work I needed to replace the entire catalytic convertor and center pipe which would cost $2591.24. I just talked to a local muffler shop and they said they could cut out the catalytic convertor and replace it for $186- I'm trying to figure out if that will be sufficient. It's much more in my price range. When I called back the dealership the other technician said he'd never seen anyone need another whole computer that the catalytic convertor takes care of it.