Quote:
Originally Posted by Joel50
From the diagram:
#3 checks for the O2 sensor heater element integrity .
#4 checks for the presence of power to the heater element and the integrity of the PWR GND circuit.
#1 checks the signal output from the O2 under normal conditions.
#2 checks for the O2 signal change causing an obvious lean condition..... in your case, you would have to cause an obvious rich condition.... due to the lean codes.
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Got it! #4 is oviously in a koeo , #3 apears to be the same, koeo . I am assuming that "at engine temp" means that #1&2 are done in a koer state. How do you test an O2 with the engine running and plugs disconnected and not get a "check" light. Or do you just ignore it knowing that your in a test mode??????
