P0420
#3
Instructor
Thread Starter
Thanks .
How many cats do I have ? How many oxygen sensors?
Also, if the cat was bad, wouldn't the light be on all the time. Check engine/ vsc. Has been coming on and off 3 times during the year. Each time I thought it was a dirty battery connection.
103k miles... Could the sensors be bad at this point, or a cat?
How many cats do I have ? How many oxygen sensors?
Also, if the cat was bad, wouldn't the light be on all the time. Check engine/ vsc. Has been coming on and off 3 times during the year. Each time I thought it was a dirty battery connection.
103k miles... Could the sensors be bad at this point, or a cat?
#4
Instructor
Thread Starter
Ok so 0420 is left bank.
So either one of the 2 sensors, a cat, or a cat gasket. What's weird is that the cel comes up randomly from time to time.
No funny smells, no extra noise from the cat. Car drives fine
So either one of the 2 sensors, a cat, or a cat gasket. What's weird is that the cel comes up randomly from time to time.
No funny smells, no extra noise from the cat. Car drives fine
#6
Thanks .
How many cats do I have ? How many oxygen sensors?
Also, if the cat was bad, wouldn't the light be on all the time. Check engine/ vsc. Has been coming on and off 3 times during the year. Each time I thought it was a dirty battery connection.
103k miles... Could the sensors be bad at this point, or a cat?
How many cats do I have ? How many oxygen sensors?
Also, if the cat was bad, wouldn't the light be on all the time. Check engine/ vsc. Has been coming on and off 3 times during the year. Each time I thought it was a dirty battery connection.
103k miles... Could the sensors be bad at this point, or a cat?
#7
Instructor
Thread Starter
Guys thanks for chiming in. If the problem persists, I will start with the rear left oxygen sensor. $160 at sewell. I don't see why they are so expensive.
Car just turned 104k. This code has popes up 3 times during this year. Each time I would disconnect the battery for a minute and all would be fine .
Code comes on randomly, mostly while driving and long after I start driving, so car is warm.
First the check engine lights up, VsC soon after that.
I don't mind spending money on the car to fix the problem, just want to make sure I'm not throwing money away. There is no way I'm driving with check engine lights on.
As of now, it's off. Been 3 days.
Car just turned 104k. This code has popes up 3 times during this year. Each time I would disconnect the battery for a minute and all would be fine .
Code comes on randomly, mostly while driving and long after I start driving, so car is warm.
First the check engine lights up, VsC soon after that.
I don't mind spending money on the car to fix the problem, just want to make sure I'm not throwing money away. There is no way I'm driving with check engine lights on.
As of now, it's off. Been 3 days.
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#8
Rookie
iTrader: (15)
I had the same issue with my car where the CEL light would be on and off. I was a few clicks away from buying a new sensor, but instead I went to get some copper RTV sealant. I spread the stuff to cover the gaps between the exhaust manifold and catalytic converter's flanges. CEL went away and hasn''t come back in 2 years. Not saying this is your solution, but sometimes it's just a simple leak that's causing the headache. I could have bought a new gasket, but didn't want to bother with the installation and waiting on parts.
#9
Instructor
Thread Starter
I had the same issue with my car where the CEL light would be on and off. I was a few clicks away from buying a new sensor, but instead I went to get some copper RTV sealant. I spread the stuff to cover the gaps between the exhaust manifold and catalytic converter's flanges. CEL went away and hasn''t come back in 2 years. Not saying this is your solution, but sometimes it's just a simple leak that's causing the headache. I could have bought a new gasket, but didn't want to bother with the installation and waiting on parts.
#10
If you don't want to do more work than needed or waste money on parts. Take it to the dealership or to a reputable shop with a high level scanner and pay them an hours labor to find the exact cause of the CEL.
#11
Guys thanks for chiming in. If the problem persists, I will start with the rear left oxygen sensor. $160 at sewell. I don't see why they are so expensive.
Car just turned 104k. This code has popes up 3 times during this year. Each time I would disconnect the battery for a minute and all would be fine .
Code comes on randomly, mostly while driving and long after I start driving, so car is warm.
First the check engine lights up, VsC soon after that.
I don't mind spending money on the car to fix the problem, just want to make sure I'm not throwing money away. There is no way I'm driving with check engine lights on.
As of now, it's off. Been 3 days.
Car just turned 104k. This code has popes up 3 times during this year. Each time I would disconnect the battery for a minute and all would be fine .
Code comes on randomly, mostly while driving and long after I start driving, so car is warm.
First the check engine lights up, VsC soon after that.
I don't mind spending money on the car to fix the problem, just want to make sure I'm not throwing money away. There is no way I'm driving with check engine lights on.
As of now, it's off. Been 3 days.
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