TOLex168

Almost a week now, my ES330 (2005@120K) got VSC, Trac Off, Check engine combo on my dash. So far, I changed the gas cap and reset the code a few times and still get P0500 – Speed sensor malfunction A. Everything is working, but I got only about 200 miles for the last fill up. It is very painful when I need to drive around 300-350 miles every week. Usually, I got around 300-320 miles for a fill up before I got empty light. Transmission and ABS are a bit unusual, chock up/slip/weird after getting light on my dash. No problem to drive 60-80 on free way.

Any advices would be great? I don’t want to jump in and change the two speed sensors right away. I may need to find, take off, clean, and inspection first.

Two weeks ago, I dropped a small wrench (#10mm) between engine cover and air box; and I did struggle around, could not get it out, and left it there. Yes, I did have magnetic pickup/snake, but I could not find when I need to use it. No light or any notices for a week until this Monday morning.

When I did general checkup, cleaning, oil/filter/tires change, and top up fluids, and I did not see any unusual. But, first time to use Syn 5W20 from Syn 10W30 for every 5K miles. Everything is good except O2 sensors and spark plugs which I am going to change in Spring.

Hayk

iTrader: (1)

Go look at the speed sensor. I know this may sound very vague, but you need to test and see if it has a good connection with the computer, and whether the sensor itself is good. All those side effects are caused by it.

TOLex168

No more error on my dash after cleaning speed sensors ( dark green color with two wires under air box, black color with two wires under/next battery tray). I also disconnect all connectors under driver side and in glove box near ac air filter one by one and check/wiggle every pins. Clear error code and drove around for about 10 miles, so far so good and no light, no error code.

Hayk

iTrader: (1)

How did you clean them? I hope you solved it

TOLex168

Almost a week now and still no code. I hope this solved the error code P0500.

I used box knife to scrap off any dirt to make the metal tip shine. Then I used fine sand paper (don't the number at least 2000) to smooth out, clean with shop towel and put it back.