The p0420 is catalyst efficiency code, which could be bad 02 sensors but I've rarely seen replacing both fix this code. You could try running one of the cat cleaner bottles through the fuel tank. I've seen a few videos of folks claiming cataclean works well, and folks running a gallon of laquer thinner too, but you may be staring down a catalytic convertor replacement. The fan problem is likely corrosion in that extra relay box in front of the driver wheel.

p0480 fault code

good afternoon fellow riot owners. looking for help and guidance as usual hopefully someone will have some knowledge for me lol. My patriot is a 2010 2.4 auto with 4x4 today when I was out with it I got a check engine light on and I just happened to have my scanner with me so I scanned it and it...

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I kept getting p0420 reset and changed sensors. Well p0420 again. This time the code did not clear. Exhaust manifold was cracked where it bolted to the head. 2011 pat 4wd. Replaced manifold converter codes went away. No prob since. So check for an exhaust leak around manifold.

 

Thanks bro for your advice. Where can I get a relay for cooling fan I've tried advanced and auto zone and nothing shows for that part. When you say corrosion you mean on the relay box the 2 prongs that go into board???

 

You may have to take the part number off the relay and do an online search on it. ( ebay, electronics part houses, etc.)

The corrosion can be on the relay pins, but also on the socket metal and wiring. This thread should give you an idea:

relay box, corroded wires

Having problems with my PAT It'd be good to know how people fix it without too much money spending. Could anyone suggest where to buy this relays (G8HE-1C7T-R1-DC12) in Europe. it's weird but I can only find -R- not -R1-. Is it difference between those two relays? Do I have to replace the...

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There also may be a problem with engine bay ground G111 being corroded. The wire under the crimp can corrode where you can't see it. The fix is to cut the old eyelet off, and install a new one.

More info on grounds here:

G110, G111, and G112 ground location and wiring diagrams

G110 G111 & G112 G111 G112

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@Rhyno Ryan, you didn't mention what year Patriot you have, but there is a catcon recall that might apply:

Catalytic Converter Recall for 2011-2016

If you're having problems related to the catalytic converter (p0420, etc.) and your vehicle is model year 2011-2016 there may be an open recall that applies. Use your VIN to confirm here: https://www.mopar.com/en-us/my-vehicle/recalls/search.html If you've already paid for repairs you may be...

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2017

 

I found the relay at autozone: https://www.autozone.com/electrical...lectrical-and-lighting/multiple-purpose-relay/p/duralast-relay-16024/518300_0_0 It's an aftermarket brand.

Looking at sites like Mouser, it seems that the OEM OMRON relay is no longer made.

Googling the OMRON number G8HE-1C7T-R-DC12 (MOPAR 68053218AA) gets lots of hits. I.E., Rock Auto - MOPAR 68053218AA Multi-Function Relay | RockAuto

Be careful. Lots of the very cheap ones for sale show "Made in U.S.A., but are actually China mfg.. A bit of digging does find some OMRON U.S. made ones.

 

2017 latitude addition

 

Ok, you're probably not covered by that recall, but you could try using your VIN to check for other recalls just to be sure:

Look for Vehicle Recalls | Official Mopar® Site

Search vehicle recall information by VIN or sign in to your Mopar® account to see recall information related to your Chrysler, Dodge, Jeep, or Ram vehicle

www.mopar.com