Foreign Object on Wheel Speed Sensor Questions

I vote for it being a defect in materials or workmanship, ie warranty work. Unless they have a plausible explanation on how that debris got there, the factory put it there. If the dealer is no help, escalate this to the Toyota district rep.

 

…do you have a pic of the "thin piece of metal"? …and is it magnetic? The reason I ask is whilst clearing snow 3 snow-storms ago, I found a piece of metal about ¾" x ½" and about the thickness of a nickel near one of ChuggyPig's wheels (I thought it might have been a balance weight, but they're usually made of lead, and are not magnetic (this piece is - it stuck to my snow-shovel!)

 

how do these guys keep a straight face while talking to customers? it must be quite a talent.

 

I call BS and strongly suggest an escalation to Toyota.

 

Before you escalate it, make sure you get the problem they discovered from them in writing, if they haven't already done that. Just coding 'foreign object' on your work ticket is cheap way out. If they don't give you anything in writing, then ask for your money back on grounds they bilked you on your repair and will not back it up. They likely will write it out for you.

Don

 

Alien Abduction

C1235 is RR Wheel Speed input signal missing.

 

Is the speed sensor inside the wheel barring of the rear passenger hub?

My ABS light and Traction control light are illuminated. I had Toyota diagnose it, they told me I would need a wheel barring, I think maybe they said an ABS sensor harness...not entirely sure.

Do I need to buy the ABS sensor on rear passenger wheel? If so, where do I find this item to buy? I have a rear passenger wheel barring and speed sensor wire harness.

Thanks for any help!
I've only had this car for a year!

 

A similar occurrence was previously reported on PC. Foreign Object attack on sealed hub... Uh huh.

 

My prius will pretty reliably light up with all the same lights whenever I go above 78mph. I replaced the sensor and this still happens. I generally keep 65-70 as my top speed, but sometimes my wife goes a little faster and the dash will light up. Usually the lights go away after driving at low speeds or a restart of the car. It sounds like maybe I should take a look inside, but would need to see what is involved to take the hub bearing off.

 

I have looked at the code with Techstream and it says there is an object stuck inside front left hub.

 

I took it apart and cleaned around a bit. A lot of dust and built up grim but no metal pieces. I then took it up to 82mph and no lights, so we will see if it stays fixed!

 

Well, so far so good, it seems like it just needed a little cleaning.

 

Just had the same issue several days ago, also after a snow storm. My code reading is C0210 "Rear Speed Sensor RH Circuit" and C1238 "Foreign Object is Attached on Tip of Rear Speed Sensor RH". Am on the edge of whether or not I should DIY or just find a mechanic to have it fixed. Any suggestions from the forum would be appreciated. Thank you in advance.

 

Clean the ringer and clean its harness connector.

 

So this problem went away for a long time but now I keep getting the issue with something attached to the left front sensor. It started happening when I went above 20mph. I opened it up again, cleaned it with a brush and compressed air and put a light coat of wd-40 on the rusting metal on the CV axle. Now it is lighting up every time I go above 70mph or so. Same fault code (foreign object). When I replaced the sensor about 6 months ago I went with a cheap one off of Ebay, which did not make my problem go away at that time. All that worked was cleaning it, but now the problem is coming up again even though I have cleaned it like 3 times, both where the axle is as well as cleaning off the tip of the sensor. At this point I am not sure what to do, I could replace the sensor though I am reading 1.7Kohms which I guess meas that it is still good. The other thing I could do is replace the ABS ECU, but that seems a bit drastic? How would I narrow that down as the problem?