headers install yelds TCS light

[swerve2007]

hi guys,
i've just replaced the entire exhaust- now CEL and the TCS light comes on after a minute or so of driving= obviously the CEL is triggered by an O2 sensor issue but the TCS? the 'search' tells me that the parking brake being engaged will disable the TCS- obviously the parking brake is off but i did have mess with the parking brake cable mounts during the job, and noticed that there was a fair amount of tension in one side after re-installing.
any ideas or is it 'normal' for both lights to come on?
edit: pulled the clock fuse to reset but it comes back, i'll pull the tcs code next.

 

[swerve2007]

any ideas or is it 'normal' for both lights to come on?

let me re-phrase-
is it possible for O2 sensor problem to trigger CEL and TCS lights at the same time?
what could have i disturbed during the job that would throw the TCS light (besides the possible parking brake cable issue)?

 

[nsxnut]

Yes.

I had a similar issue "bad primary O2 sensor".
I replaced the O2 sensor and the tcs light went out.
Not sure why an O2 sensor will also effect the tcs?

Later,
Don

 

[swerve2007]

great, thanks.
that puts me more "at ease".

 

[swerve2007]

thats what it was, post-cat o2 sensor- all clear again and she rips.

 

[ftuhy]

I lost both primary O2 sensors over a period of two years. In both cases the failure was in the pre-heater on the O2 sensors (and covered by the 14 year extened warranty for MY's 1995 - 1997). In both cases both the CEL and TCS lights came on.

So, when the two lights came on together the second time (in the middle of an NSXCA event), I pretty much knew what the problem was even before pulling the trouble codes.

 

[e.pie]

what is in the O2 sensors that causes the TCS to go off?

my car is having this problem right now, the TCS won't turn on

 

[swerve2007]

tcs is controlled by ignition cut-off so thats how they are related.

 

[e.pie]

is there any way to check it before I go out and buy a couple of sensors?

 

[ftuhy]

What code(s) are you getting? On the 95 & 96's, its often the heater in the sensor that goes. A simple ohmmeter test across the heater terminals on the sensor will verify the failure.

I'm getting ready for a trip and may miss your response, so PM me if you pull the codes.

Do you have access to an ohmmeter? (a cheap one is fine; accuracy is almost irrelevant) If its the heaters, I'll look up the pin numers and the expected resistance.

 

[e.pie]

I'm not sure on the code, I haven't really had time to troubleshoot it at all, I will find out when I can