What is the difference between a upstream and a downstream oxygen sensor and how many...

D

dimples

New member
...does a 96 chrysler LHS? have? If more then one do I have to replace them all. If not how do I know which one to replace? Please help!
 
Upstream O2 sensors are before the catalytic converter, downstream are after it. You should replace all at the same time if your getting a code for bad O2 sensors. You car should have 3 or 4 sensors.
 
Upstream O2 sensors are before the catalytic converter, downstream are after it. You should replace all at the same time if your getting a code for bad O2 sensors. You car should have 3 or 4 sensors.
 
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