'92 900S Check Engine Light Driving Me Crazy...

Any help would be appreciated.

Fault Codes:

12223 - Air-Fuel Mixture Too Lean 12241 - Air-Fuel Mixture Fault 12111 - O2 Circuit Problem...

Over the last year I've replaced:

- O2 Sensor (2X with thesaabsite.com's 900 86-94 Universal Oxygen Sensor)

- Wires

- Plugs

- Fuel Filter

- Dist Cap

- Rotor

Can't locate any vacume leaks. DVM on O2 Sensor indicates voltage comes up to ~0.5 volts at turn on then promptly returns to 0V. Telling me engine is running, Lean?

Questions/Comments/Recommendations?

Reply to
strung
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Make sure that you are checking the o2 sensor while it is connected to the system. If you disconnect it, it will not be a good test. Make sure that it is getting 12V to the heater and that the heater shows continuity. Once the heater warms up, it should start showing rich then lean (rich is >0.5V and lean is Any help would be appreciated.

Reply to
KeithG

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