O2 sensors

1993 CADILLAC DEVILLE
150,000 MILES • V8 • FWD • AUTOMATIC
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How many O2 sensors are on a 1993 Cadillac DeVille 4.9?
Apr 26, 2011 at 7:22 PM
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1
Apr 26, 2011 at 7:27 PM
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Thank you. I'm getting conflicting info, including info from the diagnostic circuits from the vehicle, which indicate there may be as many as 3 O2 sensors. The main complaint on the vehicle is very poor gas mileage (14 mpg on the highway). Thanks again.
Apr 26, 2011 at 7:44 PM
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Getting code E44 or E45?
Apr 26, 2011 at 7:55 PM
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E44, which says that the right O2 sensor is lean.
Nothing on E45.
Apr 26, 2011 at 8:21 PM
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Need DVOM follow tests in flow chart see diagrams
Apr 27, 2011 at 3:47 PM