Install the sensors and plug them back up, making sure the wires are not stretched tight or against the exhaust. My check engine light solid and cruise control blinking. This method could result in replacing all electrical and mechanical parts. What would you recommend under the circumstances. The light went off for 10 months and then came back on again with the same P0420 code.
Today a week later, the lights are back on. I mean WoW that's huge. The waveform of the sensor behind the converter should be more steady. Then drill a small hole i the center of the freeze plug and screw a self tapping screw into the hole. All the best and drive safe.
Look for either a tear or hole in it. It is much cheaper to go this route to fix the problem. Give a tech a break. Also used a better grade of gas and put in an additive. Since I have the ability to rebuild engines, I pulled her engine, hot tanked it spotless, replaced all gaskets, piston rings, timing chain. The function of the is to break down harmful pollutants that are created during the combustion cycle and convert them into harmless gases. They claim they put in new o2 sensors but who knows.
What I usually tell anyone who ask about testing catalyst converters is. Pay extra attention to your tank level and make sure you are not leaking fuel. If I have to use a cheeper fuel, Speedway, I get the codes in one tank of gas. Also, be sure to follow proper diagnostic procedures to determine whether a part has failed. But fuel pressue is steady at 65. Typically the P0420 code triggers the Check if the readings of the two sensors are similar. The spacer pull the sensor probe out of direct exhaust flow.
And my gas mileage shot up immensely. This is indicative of among other things a converter that is not working as efficiently as it should be according to specs. Gas milage is terrible on it now I'm beating my head against the ground with this p0420 on my 99' Honda crv. So is that the reason why I am getting that code? With in 50 miles the check engine light came back on. I'm just wondering if anyone has ever heard of the head gasket leaking coolant into the exhaust system causing the catalytic converter to go bad??? Any advice would be appreciate!!! On thing that not a lot a people think of checking is the Ethanol rating in the gasoline they use!! If there is anything that you feel like you could add, please feel free to leave a comment below.
When this system malfunctions, the fuel vapor is not being dealt with properly. Use a scope to diagnose the oxygen sensor operation Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. Good luck, Ed My check engine light came on so I brought it to the dealer and they ran a test that indicated I have a valve that's not working properly? As I read online that cat converter replacement is expensive i dont wanna go for that. Or could it of been a misfire the first time and now that he reset it this P0420 code came on because I did not deal with the misfire at that time. Everything is brand new accept catalytic converters and 02 sensors to cut cost of swap Upon completion, as soon as the car turned over I have a P0420 code, didn't want to spend the money so the car sat, I used it for some very local trips and now p0300 is present.
But my problem is the car gives out poor mpg 19-20, sometime 21 if I'm lucky. Thanks for any help before I change expensive parts that aren't needed. A dealer is supposed to sell you something that will pass inspection - they screwed me and gave me a guarantee that doesn't cover anything at all. I will update after I bench test the 02 sensor and or replace spark plugs. If all looks fine, take vehicle for a good run after dark and if cat is getting plugged it will be glowing red enough to easily catch paper on fire. Jerks sometimes in first and second gear. Heads were pulled and a complete valve job done due to a misfire caused by carbon buildup.
If the reading fluctuates then the sensor is likely bad and will need to be replaced. Since then in order I replaced the cat, both O2 sensors, fuel filter, used fuel injector cleaner in the tank, cleaned and regapped plugs and last I thought for sure would work I used the plug defowler trick on the aft 02 sensor. The downstream O2 sensor in or behind the catalytic converter reflects the condition of the exhaust after it passes through he converter. However i did see somewhere that it could possibly be fuel additives. As a Veteran Mechanic and Tech that owns and operates a shop it seems like a great thing when people give each other advice online with no tools or training. I searched around for possible cures. After 200 miles I had it retested and still coming up with 1 code, which is.
It might save your big bucks! I automatically assumed it was the turbo however, i ran the special emissions tool you can get at autozone and it is telling me this same exact code. Code P0420 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by the vehicle. How do I fix gunk in the upstream fuel system? This type code is very difficult to repair. I dont know what I should do now. Now for the Catalytic Converter…there is really none to speak of because of the Stromung Catalytic Eliminator Front Pipe 1999-2005 Impreza Non Turbo I also installed at the same time. If the light is still on pick another part and repeat and keep repeating till the light goes out. It is a 2005 Ford Taurus, so I bought it back to the guy who said I had a month warranty and said it was just a misfire and reset the code, not wanting to spend the time taking it to his mechanic, which got me angry and we had some words.