Please help before I go insane

[nalfordnathan]

I’ve got a 2011 5.7 hemi that I have sent to 15 different mechanics and no one seems to be able to get the p0420 code off my truck followed by a p0306 occasional code the motor was rebuilt in March by someone that’s supposed to be a hemi specialist and leaving the shop the check engine light came on. They’ve replaced the cats the O2 sensors and still same code as always. I’ve been fighting this code for 3 yrs please someone help me

 

[Burla]

Do you drive far or short trips?

 

[nalfordnathan]

Both more around town but not unlike me to get in it and drive 3-5 hrs away and back

 

[Burla]

There is a potential fix, dunno if it will work, i will try and find it. It involves moving the sensor farther away from the Cat's flow. So the engine runs fine? No issues at all with that misfire?

 

[Burla]

I posted a better one then this but look up the youtubes.

P0420 code fix PERMANENT, EASY, CHEAP

How to fix you emissions p0420 code for cheap, easy, fast. Watch this video and learn how to turn off you cars check engine in under 10 minutes with parts av...

youtu.be

Quick Fix for P0420/30 Engine light Codes

If you have the P0420 or 430 codes and you want to save a little bit of money before having an inspection or replacing your catalytic converter do this and i...

youtu.be

 

[nalfordnathan]

No no issues with the misfire code and thanks I’ll look at both those

 

[Burla]

If you wanna try you can use laquer thinner or other cataclean products where you can possibly clean the convertor and clean the code, or move the sensor, plenty of moves here. Again search youtube clean catalytic converters.

Just add those to a tank of gas, I would do it only 1/2 full tank.

 

[Burla]

Since the engine was rebuilt and I assume the mechanic had the engine running well, it may just be he used the old Cat, you wouldnt think to clean the Cat. When were the cats replaced, after the engine rebuild? In theory if you clean it with a cleaner, you can even pull the sensor and clean it and the cat vertor with the same stuff sea foam or some cat cleaner, you will be fine. It could be the old engine wasnt running good causing this but this was never addressed. If the cats were replaced after the rebuild, I would use the first fix and not the cleaner.

 

[CanuckRam1313]

^^ Sage Advice!

 

[nalfordnathan]

They put new cats on it right before the rebuild and replaced the O2 sensors 2 times after the rebuild. I had a guy tell me the other day that mopar cats had to be replaced with mopar cats and that aftermarket cats wouldn’t work but dang I don’t really wanna even price those.

 

[Burla]

Was it a total rebuild or just the top end? Did new o2 sensors work for a while? They didnt give you the old cats?

 

[Wild one]

I've found these to work sometimes when the old school double stacked steel wool anti-foulers trick doesn't kill the cat codes.
I haven't looked inawhile,but the last time i looked i couldn't find these on Amazon.com,so you might have to order them off Amazon.ca.

https://www.amazon.ca/gp/product/B07R5SX5XG/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

 

[Burla]

I've found these to work sometimes when the old school double stacked steel wool anti-foulers don't kill the cat codes.
I haven't looked inawhile,but the last time i looked i couldn't find these on Amazon.com,so you might have to order them off Amazon.ca.

https://www.amazon.ca/gp/product/B07R5SX5XG/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

amazon sells that, lol. They likely dont know what it is, lets not tell them, lol.

 

[Wild one]

amazon sells that, lol. They likely dont know what it is, lets not tell them, lol.

I just ordered another set of them,while i can still get my hands on them Mike,that should guarantee i'll never need them,lol

 

[GTyankee]

Are the 02 sensors the actual Mopar Brand ?
which is actually ..

NTK 23158 Upstream Right; Bank 2 Sensor 1; Actual OE Part or Upstream Left; 4WD; Bank 1 Sensor 1; Actual OE Part or Downstream Right; Bank 2 Sensor 2; Actual OE Part or NTK 23159 Info Fits Upstream Left; RWD; Bank 1 Sensor 1; Actual OE Part or Downstream Left; Bank 1 Sensor 2; Actual OE Part Found on RockAuto site 2011 RAM 1500 5.7L V8 Oxygen (O2) Sensor | RockAuto RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog. www.rockauto.com ( many Ram owners have discovered that using the OEM, Mopar Gas Cap & 02 sensors solves code problems		$25.99
)

 

[Dean2]

I’ve got a 2011 5.7 hemi that I have sent to 15 different mechanics and no one seems to be able to get the p0420 code off my truck followed by a p0306 occasional code the motor was rebuilt in March by someone that’s supposed to be a hemi specialist and leaving the shop the check engine light came on. They’ve replaced the cats the O2 sensors and still same code as always. I’ve been fighting this code for 3 yrs please someone help me

If you have been driving it for 3 years and it drives fine I would keep driving it till it F's up something I can actually find and fix.

Guys get way too fixated on codes that make zero difference to performance or how it runs.

 

[Burla]

This video is cool, dude cleans his with carpet cleaner and water, proved with boro...

Catalytic converter cleaning in less than 5 Minutes/Cleaning Catalytic converter with AUTOOL Kit

#AUTOOL #alimechAutool C100 Car Fuel Injector Cleaning kit: https://s.click.aliexpress.com/e/_A5GRq9 In todays video i will show Catalytic converter cleaning...

youtu.be

 

[nalfordnathan]

Thanks everyone for the help

 

[Daniel from Texas]

If they replaced the O2 sensors with anything but OEM, this can cause the problem. Rebuilt my 14' 5.7 and worked like new, but soon the new Bosch O2 sensor started causing crap. Changed it back to the original and haven't had any issues since. The P0420 is Sensor 1 (Upstream) it's not the cats.

 

[greg mayrhofer]

just on an odd ball chance that the o2 sensors are correct for each position, OfCourse there are 4 but two have different part numbers and make sure they are in the position they are intended for , mixing them up will send the wrong infor to the ecm and could cause the engine light on , and relate to this problem