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I have a 94 gmc suburban and I removed the catalytic converter but now the check engine light stays on why is that

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The engine is controlled by a computer, the computer is now getting bad readings from the O2 sensor, some are located in the cat, or just before it. wich will also efect the egr valve and posably the map sencer

Posted on May 06, 2014

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Posted on Jan 02, 2017

landsend
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SOURCE: Catylitic Converter is not fully consuming unspent fuel

 This is an expensive repair...catalytic coverters need replacing if everything else checks out on the car.  However, a loose oxygen sensor lead would make the car running rich

Posted on Mar 27, 2009

  • 36 Answers

SOURCE: I want to remove the catalytic converter. How do

You cannot bypass the catalytic converter and expect the car to run properly and the check engine light to remain off. When you go to replace the cat, DO NOT attempt to use an aftermarket brand. Even many of the "OEM" aftermarket converters do not have sufficient back pressure and within 2 months they are ruined. I know, I have replaced mine that was purchased at Advance Auto Parts three times in the last six months! Shell out the money for an original Mazda converter. List is about $736.50, but you can find a dealer in Virginia that discounts them 20% down to $589.08. Just remember, the car's computer is programmed to read the O2 sensors' data and adjust accoringly. A new Mazda cat will allow your car to run like it did when it came off the assembly line, everything else equal.

Posted on Aug 14, 2009

SOURCE: how many catalytic converters do a 94 wiyh 454

Why are you asking?

Posted on Sep 25, 2009

toneman2121
  • 775 Answers

SOURCE: 1996 Probe check engine light stays on

what is the code?

Posted on Feb 24, 2010

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Diagram for replacing o2 sensor


No diagram, but look for a spark-plug-like device with several wires coming out of the top located just in front of each catalytic converter in the exhaust system. Check with your auto parts dealer for the special socket that assists in replacing these items--usually not an expensive tool. It's a simple remove and replace procedure. A trip to Autozone or similar business to use their scanner to turn off the 'check engine' light when done. Hope this helps!

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