97-03 02 Oxygen Sensor - Rear

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Note: Pos 2 is pre converter at manifold, Pos 3 is after converter in pipe. What They Do: Measure the amount of oxygen in exhaust and signal computer to adjust air/fuel ratio. Failure Symptoms: Low voltage output or slow reaction causes poor performance and economy, high emissions.
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305056
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Description
Note: Pos 2 is pre converter at manifold, Pos 3 is after converter in pipe.

What They Do: Measure the amount of oxygen in exhaust and signal computer to adjust air/fuel ratio.
Failure Symptoms: Low voltage output or slow reaction causes poor performance and economy, high emissions.
Maintenance/Service: Perform periodic emissions checks. Replace according to manufacturer's specifications or every 25,000-30,000 miles. Watch for service flag or Malfunction Indicator Lamp.

Electrical components such as sensors are non-returnable parts.

Always refer to a factory service manual when diagnosing engine service problems. You can damage electrical components if the proper procedures are not followed. Be sure youare replacing the correct part.
Specifications
GM Item No. 25312202
Base Unit of Measure EA
Net Weight 0.3
Special Order False
Car Years 1 1997 1998 1999 2000 2001 2002 2003
Part # 305056
Search Description SENDER
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