Speed Sensor Replaced... Still get Check Engine Light

[Deadly Sushi]

Its a 1996 Camry LE I-4 with 99K miles.
I replaced the speed sensor. Disconnected, then reconnected the battery. The farking light went back on with the same code!!!

Any ideas?

[Deadly Sushi]

Anyone???

[LynchburgCSI]

What's the code?

edit: Again with the bumping after 3 hours?! Calm down with that man! It's a forum, not the customer service department at the dealer.

[Mister_Perkins]

Is the wiring to the speed sensor good?

[LynchburgCSI]

Where is he? I demand a response. It's been 2 hours.

Another few ideas... reset the light again and see if it comes back on. If it does, i'm guessing something with the signal the sensor is sending. Maybe a bad waveform. Did you compare the resistance of the old sensor to the new one just for giggles?

[Mister_Perkins]

I'm going CRAZY here waiting for a response!!!!!!

[Deadly Sushi]

You guys crack me up man!!!

Its P0500.
I reset it... then it came back a minute later.

Not sure about the wiring. Not even sure how I can check it!
Maybe I should take the light bulb out for the check engine! THAT could be causing it

[LynchburgCSI]

I don't like P0X00 codes. Too general. To check the wave form you'd need a lab scope. Perkins, help?

[Mister_Perkins]

You'll definitely need some kind of scope to check the wave forms. You'll need something like PICOScope, or a brand similar. Your Waveforms while watching should be in a Box type shape and all the same. You will be monitoring the Voltage, and the Frequency (Hz). As long as they are uniform, its working properly. May want to unplug the Speed sensor and unplug the harness from the computer and using a digital multimeter with continuity make sure that the wire is solid (not broken). If it has Excessive Resistance, its probably exposed to the elements causing the high resistance. You will need to find where the split or exposed wire is and repair it.

[Deadly Sushi]

Originally Posted by Mister_Perkins

You'll definitely need some kind of scope to check the wave forms. You'll need something like PICOScope, or a brand similar. Your Waveforms while watching should be in a Box type shape and all the same. You will be monitoring the Voltage, and the Frequency (Hz). As long as they are uniform, its working properly. May want to unplug the Speed sensor and unplug the harness from the computer and using a digital multimeter with continuity make sure that the wire is solid (not broken). If it has Excessive Resistance, its probably exposed to the elements causing the high resistance. You will need to find where the split or exposed wire is and repair it.

yeeeeaaahhhhhhhhhhhhh.....

Wanna buy a Camry? Either that or Im taking that bulb out.
$2500

[Mister_Perkins]

Just curious .. when changing the speed sensor, did you pull the entire assembly out? or just replace the top electrical part?

[Deadly Sushi]

I pulled the whole thing out. I thought its one piece.

[Mister_Perkins]

Originally Posted by Deadly Sushi

I pulled the whole thing out. I thought its one piece.

Oh okay.. Well that ruined my idea. lol

I'de do like lynch said and compare the resistance. Did you buy the Speed sensor new?

[Deadly Sushi]

Originally Posted by Mister_Perkins

Oh okay.. Well that ruined my idea. lol

I'de do like lynch said and compare the resistance. Did you buy the Speed sensor new?

No I got it from a junk yard. HEY!!!
Is there a way to test the speed sensor itself!?!?!?

BY THE WAY..... everything works! The Speedo... the tach...... EVERYTHING!

[Mister_Perkins]

Is your car going into limp mode?.... is it shifting very weird or erratically