My '05 Jeep Liberty 3.7L has thrown a P0430 code twice now. The first time it happened we did a flash update and cleared the code. Now it's come on again in less than 200 miles. I have under 35K miles on my Jeep. Now what do I do?
Was the check engin light on at anytime for an o2 sensor code if so you need a new cat(catalytic converter) flash update i think was a way for a mechanic to get money from you unless it was warranty covered if your o2 was malfunctioning your car was mostlikely running rich which will plug up or burn out a cat
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code p 0430 refers to catalytic converter system , bank 2 --efficiency below threshold=== causes --cat converter---wiring---HO2S 2
( that is the sensor in the exhaust manifold or pipe before the cat converter for bank 2--front bank)
According to Jeep Commander, the p0430 code means Catalyst System Efficiency Below Threshold. Best I can tell is that this has something to do with the catalytic converter, o2 sensor, or something with the exhaust like an exhaust leak. Best to take your Liberty to a mechanic. I have no clue what the code and the statement under it about the Fuse to remote door have to do with one another..... That makes no sense too me.
this is the o2 sensor after the pre cat so post cat you can get a tune to get rid of code or replace the o2 sensor or get spacer that screws into the cat witch will make it not code the o2 sensor is there to just make sure the cat is there for emissions and will not effect the gas milage
code p0733 refers to gear 3 -incorrect ration===causes---wiring---TR sensor/switch--shift solenoids---transmission mechanical fault
code p0420 refers to catalytic converter system -bank 1---efficiency below threshold===causes--cat converter--wiring--HO2s 2
code po430 refers to cat converter system bank 2--efficiency below threshold===causes--cat converter--wiring ---HO2s 2
code p0328 refers to knock sensor (KS) 1 bank 1--high input===causes--wiring short to positive--KS incorrectly tightened--KS---ECM
basically replace the cat converters as they are blocking the exhaust system and preventing your over 45mph problem
replace the TR sensor/ switch as you have not mentioned a transmission problem
Rectify the problem with the KS as it controls the air/fuel mixture setting which contributes to the car getting hot.
ok lets do this in order P0420 Catalyst System Efficiency Below Threshold (Bank 1) an o2 sensor bad usually before the Cat converter P0430 Catalyst System Efficiency Below Threshold (Bank 2) same thing but the sensor after the cat converter the c1734 people will say you need to replace a bad BCM, but don't,, once the O2 sensor problem is addressed , that code will clear , it has to do with the remote start b2090 has to do with power doors ,, this will drop off too once the system is rest , same with the last one you listed, If I was you I'd have the 2 O2 sensors checked, replace the bad one, or both, and have the mechanic clear all the codes, then recheck them
p0300: random multiple cylinder misfire detected.
p0430: catalyst efficiency below threshold bank 2
This can be a hunt and seek game here... the EGR valves on these can create havoc on the v/8 try removing it and checking it for being stuck open/clogged with carbon etc. be sure you have a new gasket when removing it, its critical to engine idle/performance.
Try taking it to an Auto Zone Parts Store and let them run the scanner on iot for free they will give you a print out and advise if that helps and its all free.
That's a pretty RELIABLE code!... You have a bad CAT (Catalytic Converter). Trust it to be accurate. The conditions which set this code is when the Upstream O2 sensor's data/signal is compared to the Downstream sensor's data/signal... when they are nearly identical, that's when this code is set (unless you have an exhaust leak).. If there is an exhaust leak.. repair it, then retest/recheck.