LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

VSC and check engine lights

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Old 06-11-17, 09:07 PM
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Stu
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Default VSC and check engine lights

My LS showed me some new lights tonight. What do they mean and what can I expect to get this repaired ?

Thanks for any help
Old 06-11-17, 10:23 PM
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bradland
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Have you recently disconnected your battery ?
Old 06-12-17, 02:59 PM
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Originally Posted by bradland
Have you recently disconnected your battery ?
No. I have not disconnected the battery (yet). I was going to do that but thought it might be a better idea to check here first. Thanks.
Old 06-12-17, 03:25 PM
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rkw77080
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I would retrieve the DTC before disconnecting the negative battery cable. That way, if the Check Engine light comes back, you can see if the same DTC is causing it.
Old 06-12-17, 03:36 PM
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Originally Posted by rkw77080
I would retrieve the DTC before disconnecting the negative battery cable. That way, if the Check Engine light comes back, you can see if the same DTC is causing it.
Thanks, but what is the DTS ? and how do I retrieve it ?
Old 06-12-17, 03:46 PM
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rkw77080
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DTC stands for Diagnostic Trouble Code, and is sometimes called "Error Code". It is logged in the car's computer whenever the Check Engine light is illuminated. You will need a OBDII reader to retrieve the code (OBD stands for On-board Diagnostic). Most auto parts stores like AutoZone will have one of these OBDII readers. They will read the code for you free of charge. This error code is very helpful in troubleshooting what is wrong with the car.
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Old 06-12-17, 05:13 PM
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Ok I will get the code read somewhere .... any idea what VSC stands for ?
Old 06-12-17, 05:32 PM
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rkw77080
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VSC stands for Vehicle Stability Control. The LS430 has a bunch of behind-the-scene and very sophisticated controls to keep the vehicle stable. You will not such automated assistance when the VSC warning light is on.

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Old 06-12-17, 05:59 PM
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Lzam
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Mine did it and it was the alternator.
Old 06-12-17, 06:47 PM
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The fix I used, Old but still works great.
https://www.clublexus.com/forums/ls-...ml#post4878286
Old 06-15-17, 06:29 PM
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LS430inDE.
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99% of the time, the TRAC OFF and CHECK VSC are warnings that follow whenever you 'throw a code' aka the CEL (Check Engine Light) comes on. When that Check Engine light comes on, the computer/OBD2 system almost always "stores" the code in memory. You need an OBD2 scanner and a cable which plugs into the OBD2 port around the driver's left shin area.

There's a whole industry/economy on Amazon etc on OBD2 scanners/tools/cables/etc. I bought a scanner a year ago for about $100 because I was in the same situation as you, plus I always wanted a "scanner" as they're referred to, just to have one, just "in case".

You can also go to AutoZone or another auto parts place and they will scan the code for free, and tell you the letter+digits of the code. The code identifies the probable malfunctioning system. Once you know which system has the fault, you fix it, then you can 'erase' the code with the scanner tool or disconnect the battery, etc.

Like RKW said, you need to find out what code(s) are in the system's memory then go from there. You can actually search for the code online, because the codes are pretty much standardized across the automotive industry.

(Sucks driving at night and those lights are shining like beacons on the dashboard, doesn't it? lol)

Let us know what the code is!....
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Old 06-15-17, 07:40 PM
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The lights has gone out, by itself .... but my guess is it is going to return later. Thanks for all the help,
This place is awesome .... just like the LS
Old 06-16-17, 09:55 PM
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Originally Posted by Stu
The lights has gone out, by itself .... but my guess is it is going to return later. Thanks for all the help,
This place is awesome .... just like the LS
Interesting to see if it comes back. If I were you, I'd still take it to a auto parts place and see if the system stored any codes.

A high frequency occurrence that turns on the check engine light, (followed by the VSC and TRAC on the LS), is the gas cap not being on tight, or the seal/gasket on the gas cap isn't sealing perfectly anymore. Any chance you fueled up a while ago and left the gas cap loose (thus triggering on the CEL) and you very recently fueled up again, this time properly tightening the gas cap?
Old 06-22-17, 06:00 PM
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The gas cap checked and it looks new. So I disconnected the battery for 2 minutes and the lights went out but returned after a 240 mile drive.
I suppose I will get the scanning done and see what codes it gives me. Thanks for the help.
Old 06-24-17, 01:44 PM
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Originally Posted by Jkallinen
The fix I used, Old but still works great.
https://www.clublexus.com/forums/ls-...ml#post4878286
when you use a paperclip and connect the two pin outs .... what exactly are you doing ? Just turning off the warning lights ?

Last edited by Stu; 06-26-17 at 09:47 PM.


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