Question about 2004 Lexus LS 430

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Hello i need your help lexus ls430 2004 auto transmition, my problem is when the vehicle not running engine start slowly rpm go to 2500 hold rpm 5 sec check engine & vsc indecation on i read the dtc p0500 vehicle speed sensor i check speed sensor wirring,replace speed sensor but dtc p0500 on speed meter working normaly.car driving normal when driving no dtc display speed meter working normal pls suggest me what i do my mail adres asifsaeedkhawaja@gmail.com thanks.

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  • Lexus Master
  • 874 Answers

Check also turbine speed sensor on front transmission case

@mecanicasesoria

Posted on Jun 13, 2017

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emissionwiz
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SOURCE: I get a DTC P0133 code on my 1998 Ford Explorer V8

it may be a defective O2 sensor here is th difinition:
P0133 - Heated Oxygen Sensor (HO2S) Slow Response Bank 1 Sensor 1 , this is the sensor on the side of the engine that #1 cylinder is on, it is the sensor before the cat.

Posted on Jan 14, 2009

  • 1 Answer

SOURCE: lexus rx300 check engine/ vsc light

After having my oil changed, the next day the trac off light and vsc light came on and don't go off...can you tell me how to get them off? HELP

Posted on Jan 17, 2009

  • 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

SOURCE: the VSC and Check engine

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.

Posted on Sep 14, 2010

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Engine idles up to 2500 and after 5 or 7 seconds, goes back down to 1200 rpm 2002 escort SOHC


Clean out the throttle body carefully and replace the auxilliary air idle valve. There is a resetting process for this valve so dont just fit and hope!
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Does the vehicle rev up to about 2k RPM and then die? Does it do this every time, meaning can you start the vehicle every time but then dies?
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I have a 2008 mercury Milan with nearly 60k miles on it. When I come to a stop the rpm drops by 1000 then recovers quickly. What should I do to fix the problem? Any suggestions will be greatly appreciated.


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Check out related help links to troubleshoot these problem:----Click the link below:---Idles Fine but RPM jumps in drive mode?http://technoanswers.blogspot.in/2012/07/idles-fine-but-rpm-jumps-in-drive-mode.html
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Engine cuts out at 3000 RPM?http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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High rpm in neutral? Inconsistant high RPM in neutral?http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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1 Answer

Check engine light on. Will not rev up over 2500 rpm. Fluctuates between 2000 and 2500 rpm and runs rough. Upon first start, you can rev fine and it runs smooth as long as you hold the rpms over 3000. ...


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