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O2 Sensor Question...Help 700

uid 18083's pic
posted by  lucid on  Fri Feb 18 04:58 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

Check fuse #11, as a shorted O2 heater wire can blow that fuse, which feeds the fuel pump.

The book says that High or Low voltage from the O2 for more tan 3 minutes sets the 2-2-1 code and the Engine Check Light. But I don't think it should prevent running (book says the symptom is "High Fuel Consumption").

I would unplug both connectors (2 pin heater and 1 pin signal) at the firewall connector for now. No signal is better than a bad one, and the heater wire(s) may be shorted to ground.

If you replace the O2, be sure you get the one for the Regina. The Bosch types are entirely different (search on titania).
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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