Focus Fanatics - View Single Post - Oxygen Sensors, OL faults, and crazy volts
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Old 01-20-2013, 10:49 AM   #7
SanduskySerpents
Focus Enthusiast
 
Join Date: Aug 2010
Fan#: 78065
Location: Va Bch, VA
What I Drive: 02 Silver Focus SE

Posts: 202
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Snap On ethos is how I am monitoring these voltages. The scanner says its in open loop fault, not open loop waiting for conditions for closed.
I will check the o2 fuse voltage with my Dvom and report back. I really have no idea about how old these sensors are but I doubt they are original stock.
The car cranks fine and first idles smooth for about a 3 seconds then goes to shit.
In order for a MIL to be illuminated it needs to trip the DTC twice for a type B code or once for a type A. Most codes are type B. your type a flashes the engine light.
In order for it to trip at least once it needs to complete its drive cycle test. Certain conditions are met during a test for Sensor and tested. I'm not certain if O2 sensors are a continuous monitor system or a non continuous. Either way its never lighting because its not meeting its conditions.
Also my tps reading is 18% at idle. I think I have a wiring issue.
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