This is topic 02 sensors in forum Tech Talk at Northern California Ford Owners  .


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Posted by v6mustanglover (Member # 545) on :
 
How can you tell if they have gone bad?
 

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Posted by st5150 (Member # 51) on :
 
If they're really shot, the computer will throw a code. If they're on their last leg, you'll notice a poor idle, poor MPG, poor part throttle response and the car can run rich at part throttle and idle.
 

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Posted by Jeff S (Member # 371) on :
 
If you monitor their voltage they should be rapidly changing at idle and cruise conditions. When they go bad they tend to slow down considerably.
 

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