Re: O2 sensor testing - again

[Huw Powell <human@nh.ultranet.com>]

> My voltage read (after a 15 minute drive) 0.220 volts, steady, no
> fluctuations for  about a minute.  I suppose my almost new CDN$130 Bosch
> replacement O2 sensor is history.  I think I will try a different brand at
> half the cost this time.

Unless it is working and the ECU is failing to control the mixture
properly - how on earth does one check that?

I know - disconnect the OXS, keep measuring it;s output, and send a
varying DC 300-700 mV signal from a power supply to the ECU.  Now does
the duty cycle change?  if so, OXS bad.  If not, ECU not doing it's job,
though the problem could be in the wiring, the frequency valve, or....?

-- 
Huw Powell

http://www.thebook.com/human-speakers/audi-main.htm