Reset the trouble light again and hope problem is resolved. I'm not seeing anything online about this valve with the P0420 trouble code and would like to have this fixed myself well. It would be a good idea to check the exhaust for leaks first. First i used cataclean and the code came back on. Hi All- This past weekend I thought I would do a nice thing and clean and Detail my wifes car.
The P0421 code can be very serious. I have 1600000 miles on the engine. I was using Gasoline that had 12% Ethanol and didn't know it!! Your comments would be much appreciated. The only exhaust system problem I'm aware of is a hole in the muffler, just haven't had a chance to replace it. The reason why your getting a P0420 and the reason why your radiator fans keep turning on is because your catalyst converter is getting very hot because it is clogged with half burned oil. To diagnose start with following.
There are many stories in our forums where folks replaced the cat with a cheaper aftermarket one only to have the code return shortly thereafter. The installation of the clock and reveal is far easier than the removal process. Your help is greatly appreciated. The diag engine program show the P0420 error. This engine code can be triggered by any one of the following: 1.
Hindsight, it just makes sense, that if something isn't performing as it should upstream that parts downstream will not give accurate readings. I have a very strong running truck, I will give it gas and end up spinning my tires by accident. I read a few and I strongly believe that the gas has something to do with this. This is what the computer is looking for. In any case, it seems that since P0420's can often result from incomplete combustion issues, whether from bad or ethanol spiked! That led to plugs, both coil packs and valve cover gasket after finding oil in spark plug hole. Some fail because they want to. I feel that it is a vacuum leak intake manifold.
If you replace you cat converter with a universal it will not resolve your Issue. I was able to clear the code. The P0420 code just popped on and have read in many places that the catalytic converter is the probable cause. I'm going to the dealership tomorrow to have them check the code and see what happens!!! While I was working on it I replaced leaking valve cover gasket, replaced plugs with Motorcraft plugs, replaced temp sensor, changed oil, and dumped into gas tank 2 bottles of water remover. Unplug O2 sensor wires carefully, remove the sensors and spray them very good and wipe them off. The catalytic converter is located in the exhaust pipe just after the upstream oxygen sensor, and it resembles a standard muffler.
Some aftermarket catalytic converter manufacturers make cheap parts and can fail prematurely. P0420 refers to the catalytic converter or — more specifically — the oxygen O2 sensors before and after it on the bank 1 side of the exhaust system. Also what is the differance between a scan and diagnostics. I have 190 and 197 that I recently posted. Had the p0420 trigger my check engine lift in my Jimmy.
I took it back to the dealer and they replaced the 02 censor. I had the catalytic converter replaced in july of 2009 and the front O2 sensor replaced a few months ago. After getting my 1st P0420 at 104K miles and the factory-original catalytic, I replaced the catalytic with a Walker 16385 direct fit best? Your check light will remain on too. To the contrary, the air-fuel sensor will be at a stable voltage. I change the spark plug wires and noticed a big difference in power. If the rear O2 or oxygen sensor s is switching like the front it will set the code. Watch the upstream and downstream oxygen sensor values for bank 1.
A three way catalyst converter Manifold with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. In order to get the right converter look under your hood and find the Emission number for your make of car in calif. If vehicle is working fine it is more than likely the downstream O2 sensor. It is especially volatile since it is right next to the hot exhaust at all times. I bought this car a few months ago from a used car dealership. I was thinking about cutting the wiring to the O2 sensor and putting a resistor in between the wires. Any suggestions on what to do next? It was on before and had a p0300 so I changed the wires, plugs, cap and rotor.