Hi. I went to autozone and diagnosed with code p0172 on my 2005 Lexus GX470. I have vsc trac, vsc off, anti skid, and check engine light on. The lights come on for about 100 miles and goes off for same distance and come back on again. It’s been like that for almost a year now . Can someone please help so I don’t have to spend so much money on replacing all the sensors

The ES330 has a notoriously bad fuel cap problem. Notice that if you tighten the cap two clicks it will come off with one finger. They apparently have a different cap not just a new cap. It will cause the Check Eng light to come on but apparently may also affect the VSC because it affects engine performance. When the VSC light comes on it will also shut down Trac Control and turn on the light. Replace the fuel cap! Cheap first fix. If you need to clear codes when you get the cap at Autozone they'll scan it and clear codes.

Hello, the reason for the vsc light to turn on is that the check engine light came on first causing the vsc system to become disabled, this is normal, once the cause of the check engine light is fixed the other lights will turn off. You'll need to find out the diagnostic codes that caused the check engine light to turn on first, most auto parts stores like autozone, pep boys, o reilly can help you with getting those codes from the computer and they do this for free in most US states, when you have the code numbers you can reply if necessary and I can advise as to what should be done.

i had an issue with a nissan xterra and it turned out to be a Cam position sensor. Who would have thought? Engine light would be my primary concern, local auto parts store (advance or autozone) can pull the service engine code.

Hello and welcome to FixYa... the Engine light and VSC light will come on together when a fault code is stored in the computer
...the codes will need to be read to determine what caused it, based on that information, repairs needed can be taken to correct it...i hope this helps and good luck with the Lexus

For some reason on Toyota and some Lexus vehicles certain check engine light CEL issues also result in the ECU lighting up the vsc trac and vsc off lights. The ECU actually switches these anti skid and anti lock brake systems off and the lights are to remind you that they are disabled. 1) Check that the fuel cap is on securely 2) Check the oxygen sensors on the exhaust, check that connections are clean and there are no missing wires. 3) Have someone check the on-board diagnostic codes if the CEL is still on

Battery was diconnected for 1 minute and then reconnected. All lights are off.

Check engine light. You will need a OBD II reader to retrieve the code.
Please let me know what you found.

Saw this on a Lexus user club site ---

• Vehicle Skid Control (VSC) senses the onset of loss of lateral traction and helps the driver stay on track. Input from four wheel-speed sensors, a yaw-rate (directional) sensor, a deceleration sensor, and a steering-wheel-angle sensor is communicated to the VSC computer. The system has the ability to reduce power and to control the brake actuator. Working with both ABS and TRAC, the VSC system helps the driver to compensate for loss of lateral traction, which can cause skids and loss of vehicle control. Lexus Vehicle Skid Control (VSC) is an electronic system designed to help the driver maintain vehicle control under adverse conditions. It is not a substitute for safe driving practices. Factors including speed, road conditions and driver steering input can all affect whether VSC will be effective in preventing a loss of control.

However, it appears Lexus owners who have reported this sort of problem did not have to do anything to fix except - things like .. uncap gas cap and put it back, remove battery leads for about 10 minutes and put back, tighten air filter hose ...all wierd.

Have you checked your owner's manual ?

how to solve the problem of p0031

2003 Toyota 4Runner - just noticed the Check engine light was on flowed by the VSC TRAC and TRAC OFF lights stay. Any Solutions?