Ignition control module

Tiny
KRAZY4X4S
  • 2005 PONTIAC GRAND PRIX
  • 6 CYL
  • 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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have the same problem?
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No
Sunday, November 14th, 2010 AT 8:15 PM

2 Replies

Tiny
RASMATAZ
  • MEMBER

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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Sunday, November 14th, 2010 AT 9:03 PM
Tiny
KRAZY4X4S
  • MEMBER

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

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Sunday, November 14th, 2010 AT 10:13 PM

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