vsc light, check engine light,trac light stay on - Toyota FJ Cruiser Forum
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#1 (permalink) Old 01-14-2010, 04:56 PM
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vsc light, check engine light,trac light stay on

alright guys this is the deal. I have a 07 fjc with 27000miles.a/t and 4x4. the warning lights (vsc,check engine and trac) have been on for awhile (at least 3months). the thing is that they come and go. this problem started when a cable was grounded and basically stalled my fjc. now that the engine is running, i even changed the fuel pump thinking it was that, i still cant get those lights off. i tried tightening the fuel cap,sometimes it works and other times it doesnt.also i have HID on my jeep but they dont last long,maybe 4 months and they are new and expensive. you guys think that maybe there is a correlation between the warning lights and the HIDS? How do i know when i need to replace an oxygen sensor? help me out guys please!
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#2 (permalink) Old 01-14-2010, 05:27 PM
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Re: vsc light, check engine light,trac light stay on

Sounds like you need to take a trip to the dealer.

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#3 (permalink) Old 01-14-2010, 06:38 PM
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Re: vsc light, check engine light,trac light stay on

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Sounds like you need to take a trip to the dealer.
I have had the same lights come on for different reasons. They came on for my intake tube maf gasket was leaking air in, and also for the exhaust gasket leaking. I'm starting to think they come on for everything....
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#4 (permalink) Old 01-14-2010, 06:46 PM
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Re: vsc light, check engine light,trac light stay on

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gescobar30 previously said: View Post
alright guys this is the deal. I have a 07 fjc with 27000miles.a/t and 4x4. the warning lights (vsc,check engine and trac) have been on for awhile (at least 3months). the thing is that they come and go. this problem started when a cable was grounded and basically stalled my fjc. now that the engine is running, i even changed the fuel pump thinking it was that, i still cant get those lights off. i tried tightening the fuel cap,sometimes it works and other times it doesnt.also i have HID on my jeep but they dont last long,maybe 4 months and they are new and expensive. you guys think that maybe there is a correlation between the warning lights and the HIDS? How do i know when i need to replace an oxygen sensor? help me out guys please!
You need to find out what codes are coming up. Could be any number of things. Get someone to check the codes.

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#5 (permalink) Old 01-14-2010, 07:07 PM
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Re: vsc light, check engine light,trac light stay on

Fjamming had a similar issue after a self-induced electrical problem.

Read through this thread and see if any of this helps:

Fuse? Relay? Help needed.

I believe the solution ended up being the "IGN1" fuse - see the second page.

"Any problem on earth can be solved with the careful application of high explosives. The trick is not to be around when they go off..."
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#6 (permalink) Old 02-02-2010, 03:06 PM
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Re: vsc light, check engine light,trac light stay on

All my indicator lights as noted in the earlier in this post came on last week. I went to the dealership....Mechanic pinpointed the problem----bad cat converters, thats what the diagnostic code showed!!! Covered under the warranty...But since I did the JBA shorty header modification then I guess my warranty for the exhausts sysytem is voided!!!! Booooo....So I was wondering how does the computer know that the catalytic converters are bad? Is the information being relayed from the back O2 sensors (between the front cats and the back cats? If anyone knows this information please respond!!!! And if my cat converters are bad, Im thinking of changing out my headers and the stock cats, but does anyone know if there are headers that have the cats welded on (combo)....?????
headers are about a year and a half old, 20,000 miles....Seems weird that it would go bad so soon.......

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#7 (permalink) Old 02-02-2010, 11:53 PM
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Re: vsc light, check engine light,trac light stay on

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Akillez-13 previously said: View Post
All my indicator lights as noted in the earlier in this post came on last week. I went to the dealership....Mechanic pinpointed the problem----bad cat converters, thats what the diagnostic code showed!!! Covered under the warranty...But since I did the JBA shorty header modification then I guess my warranty for the exhausts sysytem is voided!!!! Booooo....So I was wondering how does the computer know that the catalytic converters are bad? Is the information being relayed from the back O2 sensors (between the front cats and the back cats? If anyone knows this information please respond!!!! And if my cat converters are bad, Im thinking of changing out my headers and the stock cats, but does anyone know if there are headers that have the cats welded on (combo)....?????
headers are about a year and a half old, 20,000 miles....Seems weird that it would go bad so soon.......
I would talk to Gadget from URD.....
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#8 (permalink) Old 05-04-2010, 06:46 PM
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Unhappy Re: vsc light, check engine light,trac light stay on

I took mine to the dealer today. Its a 2007 and I had 4 lights on the dash--Check Eng, VSC Off and VSC Traction and one other. They called and said if I had changed the Gas Cap--I had--i'd put on a locking one (after market). They said it's not getting a "good seal" and that's what putting it on...I asked "What about the VSC lights" and he said they are "all connected" or "all related"--it was a little vague. They wanted to charge me the "diagnostic" fee since I had on an aftermarket gas cap. Plus $20 for a new cap. Turned them down cuz I still have my original cap at home....so I went to pick it up. THey didn't charge me but they didn't reset the lights....I put the original cap back on and went to fill it up. So I'll wait a couple of days and take it back--see what happens then.....
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#9 (permalink) Old 05-04-2010, 11:37 PM
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Re: vsc light, check engine light,trac light stay on

Quote:
Akillez-13 previously said: View Post
All my indicator lights as noted in the earlier in this post came on last week. I went to the dealership....Mechanic pinpointed the problem----bad cat converters, thats what the diagnostic code showed!!! Covered under the warranty...But since I did the JBA shorty header modification then I guess my warranty for the exhausts sysytem is voided!!!! Booooo....So I was wondering how does the computer know that the catalytic converters are bad? Is the information being relayed from the back O2 sensors (between the front cats and the back cats? If anyone knows this information please respond!!!! And if my cat converters are bad, Im thinking of changing out my headers and the stock cats, but does anyone know if there are headers that have the cats welded on (combo)....?????
headers are about a year and a half old, 20,000 miles....Seems weird that it would go bad so soon.......
The rear most O2 sensors determines if the cats are working. If the one or both of the rearmost O2 sensors is malfunctioning for some reason (bad sensor or bad wire) it will set an erroneous code re: bad cat(s).

Did they tell you what the code was? Was it both cats or just one?

You can get a rough idea of whether a cat is functioning if you take an infra red temp sensor and point it at the front of the cat and then at the rear of the cat. If the temp at the rear of the cat is higher by over 100+ degrees then you might conclude that it is working. But this is just a ballpark, shade-tree mechanics way of checking it.

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#10 (permalink) Old 05-04-2010, 11:39 PM
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Re: vsc light, check engine light,trac light stay on

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BlackFJ2007 previously said: View Post
I took mine to the dealer today. Its a 2007 and I had 4 lights on the dash--Check Eng, VSC Off and VSC Traction and one other. They called and said if I had changed the Gas Cap--I had--i'd put on a locking one (after market). They said it's not getting a "good seal" and that's what putting it on...I asked "What about the VSC lights" and he said they are "all connected" or "all related"--it was a little vague. They wanted to charge me the "diagnostic" fee since I had on an aftermarket gas cap. Plus $20 for a new cap. Turned them down cuz I still have my original cap at home....so I went to pick it up. THey didn't charge me but they didn't reset the lights....I put the original cap back on and went to fill it up. So I'll wait a couple of days and take it back--see what happens then.....
If it was indeed the cap, in a few days the lights will reset themselves if all is well (when the system runs the next evap test).

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