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Old October 24th, 2009, 12:33
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Ecomike Ecomike is offline
NAXJA# 2091
 
Join Date: Dec 2006
Location: MilkyWay Galaxy
Posts: 15,100
Re: Testing Jeep O2, Oxygen sensors

One more thing, if any one of the grounds or the O2 sensor to ECU/PCM wire reads a high voltage chances are the wiring harness is damaged and the 12-14 volts for the O2 sensor heater is getting through a bad spot in the wires insulation and contacting a ground wire or the O2 sensor wire feed to the ECU/PCM. Also not the O2 sensors fault, but a wiring problem.
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