IS F (2008-2014) :: Code P0420 After New X Force Exhaust System Install
Feb 2, 2016
just recently installed the new X force exhaust system on my 2008 ISF with 72,000 miles on it. I've had the exhaust on the car for about 300 miles it when I was driving home from work today the vsc and check engine light pops up. I turn the car off when I got home and then turned it back on the check engine light was off but the stored Code was still there when I read it with the scanner P0420. I'm thinking maybe there's an exhaust leak even though it sounds fine.
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Had the check engine light in the 2005 F150 (90,000 miles) come on. Got the code checked and its P0420. I know that has to do with the cat threshold levels etc. So I believe I am looking to replace the o2 sensor, if I am not mistaken.
How hard of a job is this? Ive done a decent amount of engine work. Just looking to see if that is the right thing to try first, replacing the sensor, before replacing the cat.
Also I know its the right bank, but if I am not mistaken there is a before and after the cat o2 sensor, which do i replace? Both?
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I have a 2001 Chevy Prizm that I just had the front pipe replaced on. It was not accelerating well and making noise. New front pipe and it feels like a new car. The check engine light came on. i cleared the code, drove it for a day or so, and the light is back on. My exhaust mechanic says we don't really need to worry about the cat con hurting our engine unless we see a decrease in performance. Are there any mechanics out there who would say that is true. The car has 160,000 miles and we want to see it go another 100,000 or so, and not do anything to damage the engine.
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Where can I get the signal for the rpm to install on my NOS system
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I went to start my car this morning after not driving it for about three days and nothing happened when I pushed the start button. So I double checked to make sure it was in park, had my foot on the brake and again the car wouldn't start. The only thing that would happen is it would engage the accessories same as if I pushed the start button without having my foot on the brake pedal. I did notice that the brake pedal felt unusually hard as in, it would not depress more than a few millimeters. I decided to push on the brake pedal with considerable amount of force which resulted in it depressing maybe a few millimeters more. Then when I pushed the start button the car started up and the braked pedal sank a few inches like normal when the car first starts up. Everything was normal after this. Made a few pit stops on the way to work and the brakes felt fine and the car started perfectly normally.
I have had the car for only a week and a half. It's a 2012 isf.
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I own a 2004 Ford Taurus (3.0L V6, OHV (12), non-flex fuel) registering a P0420 engine code. If I can smell exhaust fumes in the cabin, can I assume there is a leak in the catalytic converter system, or could the O2 sensors be the issue (or could it be the catalytic converter itself...)?
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So today my CEL came on. I immediately looked at my mileage and I was EXACTLY at 500m past my oil change the other day. I checked the dip stick and lo and behold, it was about 3/4" past the full marker. I took it back to the oil change place and had them drain it down to a good level.
I had driven from NH to NY this week. I filled up my gas tank on my way home from NY. Gas cap was on nice and tight for sure.
The code is still on (not sure how many miles or drive cycles is required) for something to clear. I figured it was perhaps due to too much oil added. I decided a few hours later to take it to AutoZone and grab the diagnostic code. It's a P0420 code (Cat System efficiency below threshold: Air leak in exhaust before rear HO2S, AF Sensor Error, Fuel System Fault, Faulty Catalytic Converter).
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P0420 Catalyst System below efficiency -- bank 1
I've had this code for a couple months trying to trouble shoot it. My gas mileage has been affected, as I'm getting about 23/24 MPG city/highway. I replaced the upstream 02 sensor with am aftermarket Bosch variety( I'm not sure why a non-OEM one would make a difference, as long it's working correctly).
My car has 253k miles, the cat doesn't rattle and I don't smell any rotten eggs or anything, but it has to be clogged or the 02 sensor I got was defective. My engine runs fine and I don't have any problems accelerating or decelerating. It may still be the 02 sensor since the gas mileage decrease is so significant, or it could be my converter is really clogged up.
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On my 2002 (AVH) 2.0L 4cyl Jetta I have a persistent P0420 error code: "Catalyst System Efficiency Below Threshold"
I changed the oil, cleaned the Mass Airflow Sensor, replaced the coolant, thermostat, and coolant temperature sensor. But it's still showing up.
OBDII says it could still be:
A damaged or failed oxygen sensor (HO2S)
Downstream oxygen sensor (HO2S) wiring damaged or connected improperly
Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
Retarded spark timing
The oxygen sensors in front and behind the converter are reporting too similar of readings
Leaking fuel injector or high fuel pressure
Cylinder misfire Oil contamination
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Book says "catalyst system efficiency below threshold (Bank 1)".. Is it just based on mileage or an actual bad O2 sensor or other bad system component?
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I have a 2011 F350 CC long box 4x4, with a 6.2, 93,000 km on it. I periodically get a P0420. I clear it and sometimes it comes back in 10 or 20 KM and sometimes it comes back in a couple hundred km. Been doing this for about 800 KM.
Yesterday I got an exaust leak at the joint where the exaust manifold meets the pipe beside the engine. Checked close, bolts appear intact, leak is on the outboard side blowing towards the frame. Looks like a gasket or donut seal failed.
I am wondering if the catalytic converter was plugged or restrictive, would this cause the P0420 and could back pressure from a restricted catalyitic converter cause the gasket to blow?
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I have a 2014 F-250 Super Duty Crew Cab 8' bed XL trim package with the standard am/fm/cd without sub woofer stereo. I don't have steering wheel controls. I'm looking to install an aftermarket navigation stereo (double-din) with a backup camera. I am having a very hard time finding a wiring harness or a dash install kit. I've searched both 2013 and 2014 but haven't found anything.
In addition, the guy at my local car toys told me that the accessory power in the wiring harness is only 5v for the stereo, and that because of that they have to splice into my wires to get a true 12v accessory power for my stereo to power on. I'm not a big fan of splicing into factory wiring harness to install an aftermarket stereo on a truck that has barely 1000 miles on it.
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I took my car to get inspected today and it was rejected because of P0420 and P0430: Both Catalyst system efficiency below... My check engine is also on.
I have the full Meisterschaft exhaust installed (+midpipe) PPE headers and K&N intake. Whats the problem and how can I get this fixed so I can pass the inspection?
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Had the check engine light in the 2005 F150 (90,000 miles) come on. Got the code checked and its P0420. I know that has to do with the cat threshold levels etc. so I believe I am looking to replace the o2 sensor, if I am not mistaken.
How hard of a job is this? Ive done a decent amount of engine work and worked in a shop in high school. Just looking to see if that is the right thing to try first, replacing the sensor, before replacing the cat.
Also I know its the right bank, but if I am not mistaken there is a before and after the cat o2 sensor, which do i replace? Both?
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Having problem after installing 15mm spacers. Cleaned the hub with sandpaper and re-torqued but still getting somewhat wobbling on flat roads.
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I recently changed from a problem-ridden SCT Livewire to a SCT Xcalibarator3, and now when running my custom tune I get a check engine light and a error code P0605. I never got this on the same tune with the Livewire. What causes this and how to fix it?
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I had my local race shop install my new PPE headers and how I have a rubbing and grinding sound while taking right turns. They have had the car for a few extra days and they say they cant seem to find the cause of the problem. It rattles on a pot hole, it grinds on right turns and sometimes vibrates on highway cruise control driving.
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I had a ford technician plug in and check my CEL. Says P246E, Bank 1 sensor 4, exhaust system fault. I am leaving for holidays in a couple of days but dealer to busy before I leave. Is this something that will leave a guy stranded on the side of the road? I've already been towed once...
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2014 F250 Diesel... I got the msg saying 50 miles until speed limited to 50 mph. None of the earlier warnings re adding def. check def on computer and it said it was ok. I even added def and it only took a small amount until it overflowed. It was more than 1/2 full. The error message did not reset. I drove it around for several miles and it still would not reset. Having it services as we speak, and the tech is still having difficulty running down the cause. He has done a regen,and reset the computer and etc and still has not resolved the issue..
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My 2008 Camry SE 2.4L rattles loudly when I accelerate. It happens all the time & I believe it's the braided portion of the exhaust system. It sounds like tin rattling.
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I am almost 16 and I have a 2006 F150 FX4 with a 5.4 6 1/2 bed and i need a good sounding exahust. I dont wanna break the bank and i need to pass PA state inspection.
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