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  #1  
Old 02-17-2013, 06:28 PM
saurey64 saurey64 is offline
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Default 97 dodge ram o2 sensor problems

I have a 97 dodge ram 5.2 I cut out the catalytic convert and replaced it with a peace of pipe and put the o2 sensor in the pipe and on my obd 2 sensor reader says open loop due to low temp I have no idea what is going on I have been reading about it and it says that the coolant temp sensor is bad but I don't know
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Old 02-20-2013, 02:27 PM
Krolik Krolik is offline
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Did this model have an O2 before and after the cat?

You'll throw a CEL with the after cat O2 (bank 1, sensor 2 I think it is) with the cat gutted or removed. One method I use on my imports and other cars is to put in a spark defouler under the last O2 sensor. It moves it away from the exhaust stream a bit, but it'll trick the computer into reading as if a cat was still in place. Just food for thought and a $4.50 part at Autozone or other parts store to give a shot with.

Good luck!
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Old 02-20-2013, 02:45 PM
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snrusnak snrusnak is offline
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What is the code that you are reading?

I'd do the spark plug non fouler trick. You'll need two, drill one out so the O2 sensor threads into it, then thread that into the other(undrilled) non fouler. Then thread the entire thing into the bung in the exhaust pipe.

The good news is the rear O2 sensor doesn't effect anything other than emissions control. So it won't effect performance.
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