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 [email protected] thanks.

Marvin

• 85242 Answers
• Posted on Jan 14, 2009

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.

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

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

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

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.