Wide Ratio Bosch O2

[John Andrianakis]

Thank you for the SAE paper number Bruce. If I come up on something else
considering O2 sensors I will post it.
I have lately come up to some very strange Bosch O2 sensors fitted in
1997- model VW and Seat. They look like standard foor wire sensors(2 for
heater, 1 signal, 1 ecu ground) but when I tapped into the signal line I
saw a range of 0-1500mV and not the usual 0-1000mV. I thought that the
this 1 Volt range was the limit of the ceramic element's capability to
create voltage. Though these sensors are not wide ratio I remain
puzzled.???