Had an check engine code 17 a few times. Reset it every time
but it comes back once in a while. According to the foult chart 17 means " O2-sensor signal wire is shorted to positive or ground ".
What has to be done ? could this be more than just a bare wire touching something somwere? Please help.

Lambda Test
 

To verify the fault, a Lambda test would verify that the O2 sensor is bad. If it's shorted, then the meter would deflect full scale. Your air/fuel mixture is not correct if it is defective.

For my car ('94), code '17' is a "Data exchange malfunction between individual control modules". Are you sure that the DTC is an O2 sensor?

Also my car uses a 'heated' O2 sensor. This supplies 12V bias to ensure that the sensor sees a constant operating temperature. I suppose it could short out causing your fault.

Again a Lambda test will show how good it is. It's physically located on the exhaust headers so it may be removable from the top side. My is NOT, only from underneath.


[Edited by JimF on 05-09-2001 at 03:29 PM]

Prety sure this is correct. O2 sensor was changed 6 month ago. The foult is intermitent. If i can reset the light and it takes few weeks for it to come back, means something goes wrong for a short period of time and desapears. What can this be though ? How can I trace the wire?

Can any one help ?! :(