Question about 2002 Chevrolet Impala

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I have a 2002 Chevy Impala 3.8 LS. The Traction Control system will not disengage. This system needs to be turned off for a smog check. The CA smog check requires the vehicle to be tested on a Dyna scope. Pressing the Trac Off switch on the dash does not do anything. I ordered the dealer only Trac Off switch, installed it and still the same. Twice during the 10 days I was waiting for the switch to arrive, the Trac Off light flickered on and off with a constant chime and continued until I could pull over and turn the ignition off. During that period my original Trac Off switch was unplugged and riding in the console box! I went to one Smog Check Shop because he said he could bypass the system by removing the fuse for TCS. That fuse also is for ABS and the ignition. The car will not pass smog when it is off! What do I do? To make it more pressing, I got a parking ticket in Santa Cruz for my registration not being complete. If I complete the registration before 3/21, the fine is $10.00. If I can not meet the due date the fine is $78.00. HELP!

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nox is from running lean..... its realy high temps that cause this.......... replace the o2 sensors this should cure that any more help let me know

Posted on Oct 24, 2008

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SOURCE: 2003 Chevy Impala Service Traction Sytem show on Dash

I can't answer the question about the gas fumes, but I had the same problem last year with the "Service Traction Sysytem" message and the Trac and ABS lights coming on in my Impala. Mine turned out to be because of a bad wheel bearing, that was causing the ABS and traction system not to work. I'm not sure if you've experienced this, but another thing that would happen with mine was that I would go to brake and have a hard time depressing the brake pedal, almost like it was pushing back. That is the point when the Trac and ABS lights came on.

Posted on Jan 22, 2009

  • 42 Answers

SOURCE: smog pump was removed from my 01 s10 and the truck

the computer is programmed to work with all devices the car came with. yes, removing the pump can cause this. also, contrary to popular belief, removing the smog pump causes your gas milage to go down.

Posted on Mar 18, 2009

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SOURCE: wont pass smog due to check engine light is on

check main fuse's under the hood and yes that will trip checkeng light

Posted on Apr 18, 2009

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SOURCE: I have a 77 chevy 1/2 ton what does it need to pass smog in Ca.

should be emissions lable under hood,will show diagram of emission components that truck was shipped with.If not take vin to local chevy dealer.Service department may be able to pull build sheet from gm global.

Posted on Jun 16, 2009

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