Electrical help VSS error code P0500 needed

circpro · **Joined:** Sat Mar 03, 2007 3:53 pm **Posts:** 3

If I accidently applied 12v constant power to my vehicle speed sensor, would I most likey 1. Short out the sensor and ruin it. or 2. Screw up the ECM? My only problem is the check engine light, and somestimes erratic shifting. My code error was P0500

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andywheelz · **Joined:** Fri Jan 26, 2007 1:10 am **Posts:** 112

Are we working on a farm tractor?

Year, Make, Model...

circpro · **Joined:** Sat Mar 03, 2007 3:53 pm **Posts:** 3

2007 toyota corolla

andywheelz · **Joined:** Fri Jan 26, 2007 1:10 am **Posts:** 112

Does your Spedo work?

Is that a 2-wire sensor? Check it for resistance. I don't have specific info for your sensor but a Ford focus VSS resistance is between 1000 and 1250 ohms.

Maybe PCM VSS circuit has some protection and survived your electrocution.

circpro · **Joined:** Sat Mar 03, 2007 3:53 pm **Posts:** 3

Yes the speedo works fine, my only problem is slight shifting problems in the transmission. My main worry is damage to the ECM

andywheelz · **Joined:** Fri Jan 26, 2007 1:10 am **Posts:** 112

I looked up the P0500 code and here are things to check.

* Open or short in vehicle speed sensor circuit
* Vehicle speed sensor
* Combination meter
* ECM

Get it checked out, might be covered by warranty. If tranny has a minor problem now, it could turn into something that will cost few thousands.

Electrical help VSS error code P0500 needed

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