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Exhaust system red light - low power

Tiny
MIKED007
  • MEMBER
  • 2005 ISUZU NPR
  • TURBO
  • 2WD
  • AUTOMATIC
  • 104,876 MILES
While driving a red light came on saying EXH. System and truck wouldn't go over 10 miles we stopped and took out the air filter now it will not go over 50 mph and the red light is still on. Can anyone help?
Tuesday, December 10th, 2013 AT 8:19 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
I believe the light deals with the exhaust system. However, what exactly set the light to come on is another question. My guess is it deals with the catalytic converter being partially plugged which would cause a major power loss.

Here is a guide so you can confirm the problem.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please run down this guide and report back.

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Tuesday, December 10th, 2013 AT 8:41 AM
Tiny
MIKED007
  • MEMBER
  • 2 POSTS
You hit the nail on the head the cat was almost completely plugged, all set the truck is running great cost me $430.00
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Tuesday, December 10th, 2013 AT 8:44 AM

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