Question about 2004 Toyota Sienna

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PO500 vehicle speed sensor 2004 toyota sienna

Computer analysis says error code PO500 speed sensor A. However, Tire light is on, ABS, VSC, and brake light is on. There is no anti-lock braking going on. have to do it the old way. ;) What is going on? Do the wheel sensors have to be changed? If so, is it a particular one? Thanks!

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VSS is in with the TCM in the transmission. If you have tyre pressure senders then the light is telling you of a malfunction in that area . ABS will not operate unless a wheel stops under brakes and then only that wheel receives attention from the ABS unit. So if you are on a hard surface road and braking normally there will be no ABS action at all. Under heavy brakes when the wheels start to skid you will feel a pulsation in the brake pedal and that is the indication that the ABS is working. You will in affect (when the ABS is working) take a greater distance to stop than normally expected.

Posted on Feb 16, 2014

Testimonial: "I know the ABS does not get used at all times. Believe me, this winter's ice and snow on our hilly driveway have more than indicated the ABS is not working! We need to know Does "speed sensor A" refer to a specific wheel, or the tranny?"

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SOURCE: i have a 2006 avalon with code po500. no

Hello Hotrod.

It may be a bad speedometer head/instrument panel if everything else has been checked/replaced
It certainly would be the item I would look into at my shop.

On many Toyota's the signal from the speed sensor goes to the instrument cluster first and then it is changed to a digital signal by the cluster and sent to the ECM. I wonder if they checked the speed signal with a scan tool. This would access the signal at the ECM and should prove this.
This signal would also be sent to the ABS module so it may be the next step.

I hope this helps you diagnose the problem.
Thank you for using FixYa.

KL

Posted on Nov 14, 2010

  • 14036 Answers

SOURCE: vehicle speed sensor

you need to have code erased using code scanner.any time replace sensor you have to erase code or check engine light stay on.

Posted on May 22, 2013

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