Mechanics

IGNITION CONTROL MODULE

2005 Pontiac Grand Prix • 6 cylinder FWD Automatic • 205,000 miles

I have a 2005 pontiac grand prix 3.8l. With 205k miles ont. If the ignition control module is bad can it cause it to throw emission fault codes? It brings up code. P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
it also has a ignition module code that comes and goes
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Krazy4x4s
November 14, 2010.




If there's problem with the ICM I don't think it will start and also won't throw an emission code/s

Start checking the oxygen sensor/s and the catalytic converter
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Tiny
Rasmataz
Nov 14, 2010.
Ya but dies after on less you give it some gas and then runs ok. Its been getting worse. I was told the icm would cause that to happen

Tiny
Krazy4x4s
Nov 14, 2010.

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