I could be going through a really bad repair spell here. I just had my head gasket replaced and three days later my rear O2 sensor gave me a code. What are the chances this is the CAT converter?
Bad Catalytic Converter?
- Thread starter mattyice2
- Start date
WestCoastDan
TJ Addict
I had a code for bank 2 sensor 2 on my 06 TJ. Replaced with a NTK, it threw a code for bank 2 sensor 1 a week later which I then replaced. Then finally 150 miles later p0431. Good luck hopefully in your case it's just something small.
It's definitely possible. I had to replace the entire cooling system because air was getting in there. I have two questions. How much for a shop to replace the converter? And is it okay to run it till May when the inspection is due? I'm a little short on cash right now.
Before you had the head gasket replaced....were you having to top off the coolant? If so the coolant was either going into your oil and you would have had a milkshake in there or it was getting burnt and sent into the exhaust. This happened to my KJ and my old man's WK.
If you want a direct fit cat it comes attached to the downpipe that connects to the header on one end and the muffler on the other and isn't cheap. You can just measure the size and buy a universal one, but the old one out and install the new one with exhaust clamps yourself for alot cheaper.
If you want a direct fit cat it comes attached to the downpipe that connects to the header on one end and the muffler on the other and isn't cheap. You can just measure the size and buy a universal one, but the old one out and install the new one with exhaust clamps yourself for alot cheaper.
This will depend a lot on your location. Best to call a local shop and ask.
If you aren't experiencing any drivability issues (i.e. the engine is running fine) then you should be ok to wait on replacing it. If this is the case, you may only experience reduced fuel economy. You might not even notice that though.
You can test that pretty easy. It's just a heater code. Unplug it and run resistance through the heater circuit on O2 side plug. Should be 2 to 30 ohms (depending on how cool/hot the o2 sensor is). If it's open or above 30 ohms, it's a bad sensor. If the ohms check good, with an incandescent test light connected to battery positive, check the harness side heater circuit ground pin with the o2 sensor unplugged. Test light should light. If that's good, with the O2 sensor cooled down completely, unplug o2 sensor. Take your test light and touch the harness side ground and the heater control wire. Start the jeep, test light should light. 10 minutes worth of testing to know for sure.
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