Question about 1999 Lexus LS 400

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1999 LS400 shows Check VSC and comes with VSC Off and ABS lights on.

After scanning the code, it outputs C1246 and C1223. Sometimes the light will go off, but after almost 3km driving, they come up again. I have changed 2 used ABS acuraters but still failed to eliminate the Check VSC light. Could it be not running ABS Reset or any other causes? Thanks!

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Posted on Jan 02, 2017

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SOURCE: VSC/ Check Engine Light

My 2000 Lexus GS 400 just had the VSC/VSC off light and the check engine light come on. I would have to push the accelarator peddle all the way down to get it to go. Took it to the Toyota dealer and the code pulled up as the Throttle Position Sensor was out. Purchased one and having it put in. Will update if this fixes the problem.

Posted on Oct 06, 2009

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Check my last 2 RX posts from earlier today

Posted on Dec 27, 2009

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SOURCE: 2007 lexus rx350 ,vsc light on and check engine light is flashing

First check and make sure your gas cap is tight, if this does not resolve the problem read below.
A vacuum hose has become disconnected, more than likely due to having your air filter replaced. The VSC and Check engine light typically don't come on until after 150-200 miles after the vacuum hose was pulled out.
The fix: on the right-hand-side of the engine compartment behind the big plastic housing that holds the air filter you will find a black rubber hose that is not connected to anything. Squeeze the finger clamp on the hose and slide the hose back onto the half inch nipple on the back of the air filter's plastic housing.
In order for the VSC and Check engine light to be turned off, you will need to open the fuse box, right-side of the engine compartment, and pull the 20 amp EFI fuse for 10 seconds. This will reset the system. The fuse location is marked on the lid of the fuse box, also I believe the EFI fuse is the only 20 amp fuse
. This will help. Thanks, please keep updated. please do rate the solution positively .thank you for using fixya


Posted on Dec 29, 2009

  • 131 Answers

SOURCE: while driving vehicle, the VSC Off warning light

vsc(vehicle stability control) is usally part of the abs(anti lock brakes) could be as simple as a bad wheel speed sensor

Posted on Feb 25, 2010

  • 1 Answer

SOURCE: 07 lexus rx 350 with check engine light code p0304

Hi, did you ever get an answer? I have the same issue. Thanks.

Posted on Apr 29, 2010

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My lexus rx 330 Vsc and check light is ON. Scan shows codes C1224, 1201 and PO 793. How do I fix it


Fix the P0793 code. Intermediate shaft speed sensor. The others will go away, depending on the year of your car. Any transmission codes and some engine codes will shut down ABS and VSC systems.

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1999 LS400 the vsc check engine light came on. Is this a serious problem? And how to fix it?


I have a 1999 LS400 an the VSC light was continually coming and finally I disconnected the battery over night and that reset it and haven't had anymore problems.

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The abs/vsc/trac and check engine lights stay on. could this be a problem associated with emission control?


Its possible.

Whenever the check engine light comes on the VSC and Traction control will disable because they need the engine at 100% in order to function correctly. Since the ABS light is on I would have to wonder if it isn't an abs problem. Since the VSC and Traction control use the ABS sensors/system to function.

Or there is a problem with both the engine and the ABS.

The only way to know for sure is to have the PCM scanned and the ABS module to see what is goind on.

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Toyotas and Lexus cars have some unique feaures. If your fuel cap is loose or the O2 sensors on the exhaust are faulty this results in an emission problem and the engine computer unit (ECU) engages the check engine light and disables the VSC (the VSC light comes on to warn you that it has been disabled). However you have p0500 code which says the car has no speed sensor signal. The seed sensor is located on the side of the final drive from the transmission and its job is to measure the speed of rotation of the output shaft. The ECU will compare the signals from this shaft along with the speed sensors in the wheel hubs. If there is a difference between these signals the VSC is engaged to apply braking effort to which ever wheel is slipping (running faster) than the other or that the transmission speed sensor would warrant.
So you either have an emission fault has fed back to the VSC and speed sensor missing (p0500) condition, or you have a faulty sped sensor which has tripped the VSC light and in turn the CEL.
Check your fuel filler cap is on tight, turn radio off and disconnect the negative lead to the battery for 5 minutes (this should clear the ECU memory of the code error). If p0500 error and CEL and VSC lights come back on then check the electrical connection to the speed sensor. Ensure it is clean and making a good contact, check the wiring for continuity. If everything else looks good consider changing the speed sensor.

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Start by clearing all codes and driving the van until abs light returns then scan and start with the first code that you get on scan tool. i've seen this many times where a bad speed sensor that cust drive with abs light on for a few days or week the computer begins to store all sort of codes,also be sure to check the preasure sensor on the master.

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My 2000 Lexus GS 400 just had the VSC/VSC off light and the check engine light come on. I would have to push the accelarator peddle all the way down to get it to go. Took it to the Toyota dealer and the code pulled up as the Throttle Position Sensor was out. Purchased one and having it put in. Will update if this fixes the problem.

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