catalytic convertor

  1. J.Vaughn81

    Magnaflow Direct Fit Catalytic Converter Fitment Issues

    First post so hopefully I'm going about this the right way. I'm replacing the exhaust on my 04' TJ Unlimited from the manifolds to the exhaust tip. I went with Omix-ADA manifolds, fel-pro gasket, all 4 NTK O2 sensors, Magnaflow OEM direct fit downpipe/catalytic converters, and Banks Monster...
  2. KCsTJ

    Pre-cats and y-exhaust pipe repair (solved)

    I am troubleshooting a p0431 code on my 05 Sport, "warm-up catalyst efficiency below threshold, bank 2". I have ordered both NTK o2 upstream sensors which may correct the problem. However I plan to also replace the Pre cats as PM cuz it has 101k. I plan to unbolt the 2 pipes connected to the...
  3. KCsTJ

    Engine code P0431

    On day 3 of my new to me 05 Sport with 101k I'm in rush hour traffic, the tj bucks 1x and the CEL comes on. AZ reads the CEL and it shows a P-0431 code which says... "Warm Up Catalyst Efficiency Below Threshold (Bank 2)" There are two catalytic converters coming off the exhaust manifold. My...
  4. T

    Have 04 wrangler 4.0 with P0432 code: can I remove the cats?

    Have 04 wrangler with 4.0, p0432 code, can I remove both pre cats and the main cat with no problem
  5. J

    Catalytic converter code P0432

    Hey all, So my '01 TJ is throwing a P0432 code. Upon easy research, it's that the "main catalyst efficiency below threshold." I haven't noticed any drop in performance and the vehicle is pretty new to me so I don't know if it's affecting the mileage. I've gotten a quote for around 1,000$ for...
  6. TenThumbs

    New Mod, New Rattle

    Hello all. New here. Need some help with a rattle. I installed a MBRP Cat Back exhaust to the stock cat on my 04 TJ. The rattle occurs only when accelerating in drive and stops as soon as I let off of the gas. At first I thought it was the fan hitting the fan shroud but have ruled this out...
  7. jodomcfrodo

    Replacement Catalytic Converter

    Hi all, I've been forced to get my catalytic converter fixed because I'm moving to a state with emissions testing. I've had the P0420 code for over 5 years now. Recently, I had a dealer install a new converter, but the code is still present. I think this is because the converter the dealer put...
  8. ARJEEP2006

    What's the difference between a CARB vs. NON CARB compliant cat system?

    What's the difference between a CARB vs. NON CARB compliant catalytic converter system? I have an 06 X with 4.0. I'm considering replacing my cat system with Magaflow system. There are two offerings, part number 93649(non-carb compliant) and 458027 (carb compliant). Does the jeep ECM know if...
  9. Chris

    The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread

    What are Bank 1, Bank 2, etc.? Since this question pops up from time-to-time, here's an easy to follow diagram that illustrates what they mean when your OBDII code scanner (or manual) tells you something like "O2 sensor, Bank 1, Sensor 2": What does upstream and downstream mean? Simple...
  10. Don70

    2006 Jeep Wrangler fuel/ignition problem

    I have a 2006 Wrangler and have been experiencing some stalling issue when decelerating. A few days ago the check engine light came on. I checked the diagnostic codes and codes said a mis-fire on cylinder 2 and bad O2 sensor at catalytic converter. The converter was also getting hot and the...
  11. Jim W

    Catalytic converter super hot

    Need some help I have just replaced my 4.0 with a stroked 4.6 I started it up for the initial run in (20 min @ 2000 rpm to seat the rings) and I noticed that the front exhaust pipe (the one with the little catalytic converter on it) got cherry-red hot, but the rear one did not... what's up with that