P0421!?!?!?!?!?!
#1
P0421!?!?!?!?!?!
If you recognize my post name you might know I have put $6000 into a car I paid $5000 for and is now worth about $3000. This Milly now has all new Cats(a year ago), all new timing system(a year ago), all new plugs(the correct NGK plugs), 3 new coils, 2 new axles, one new front sway bar, new trans filter and pan gasket, new oil cooler seal, new ABV vent & vacuum solenoids and probably some other items I can't remember.
I am currently working through getting the A/C working again and my son drives it home from work tonight(it's his car) and the @#%^%$#@ CEL is back on - I think my heart stopped for several seconds.
First - if you're a Mazda employee out there - .........never mind.
It now has the P0421 code for "Bank 1 warm up catalyst below threshold". There is no way in #@^#@^ hell that I am spending a dime on more cats. Could this be a bad sensor somewhere? The car seems to run fine with no misfire at all.
When I had these two pre cats replaced in June of 2009, I paid $1,600 + for the two parts(no labor in that number). Any chance there is a good warranty on these parts?
Keninn, tell me it's something simple - please. I just read in another post that a Mazda bulletin TSB 01-003/01 says something about sensitive O2 sensors. Given that there is only about 10,000 miles on these new catalytic converters could it be a sensor problem?
I am currently working through getting the A/C working again and my son drives it home from work tonight(it's his car) and the @#%^%$#@ CEL is back on - I think my heart stopped for several seconds.
First - if you're a Mazda employee out there - .........never mind.
It now has the P0421 code for "Bank 1 warm up catalyst below threshold". There is no way in #@^#@^ hell that I am spending a dime on more cats. Could this be a bad sensor somewhere? The car seems to run fine with no misfire at all.
When I had these two pre cats replaced in June of 2009, I paid $1,600 + for the two parts(no labor in that number). Any chance there is a good warranty on these parts?
Keninn, tell me it's something simple - please. I just read in another post that a Mazda bulletin TSB 01-003/01 says something about sensitive O2 sensors. Given that there is only about 10,000 miles on these new catalytic converters could it be a sensor problem?
Last edited by santa6; 05-24-2011 at 09:57 PM.
#2
If you recognize my post name you might know I have put $6000 into a car I paid $5000 for and is now worth about $3000. This Milly now has all new Cats(a year ago), all new timing system(a year ago), all new plugs(the correct NGK plugs), 3 new coils, 2 new axles, one new front sway bar, new trans filter and pan gasket, new oil cooler seal, new ABV vent & vacuum solenoids and probably some other items I can't remember.
I am currently working through getting the A/C working again and my son drives it home from work tonight(it's his car) and the @#%^%$#@ CEL is back on - I think my heart stopped for several seconds.
First - if you're a Mazda employee out there - .........never mind.
It now has the P0421 code for "Bank 1 warm up catalyst below threshold". There is no way in #@^#@^ hell that I am spending a dime on more cats. Could this be a bad sensor somewhere? The car seems to run fine with no misfire at all.
When I had these two pre cats replaced in June of 2009, I paid $1,600 + for the two parts(no labor in that number). Any chance there is a good warranty on these parts?
Keninn, tell me it's something simple - please. I just read in another post that a Mazda bulletin TSB 01-003/01 says something about sensitive O2 sensors. Given that there is only about 10,000 miles on these new catalytic converters could it be a sensor problem?
I am currently working through getting the A/C working again and my son drives it home from work tonight(it's his car) and the @#%^%$#@ CEL is back on - I think my heart stopped for several seconds.
First - if you're a Mazda employee out there - .........never mind.
It now has the P0421 code for "Bank 1 warm up catalyst below threshold". There is no way in #@^#@^ hell that I am spending a dime on more cats. Could this be a bad sensor somewhere? The car seems to run fine with no misfire at all.
When I had these two pre cats replaced in June of 2009, I paid $1,600 + for the two parts(no labor in that number). Any chance there is a good warranty on these parts?
Keninn, tell me it's something simple - please. I just read in another post that a Mazda bulletin TSB 01-003/01 says something about sensitive O2 sensors. Given that there is only about 10,000 miles on these new catalytic converters could it be a sensor problem?
#3
Warranty
Yes, according to the receipt from the Mazda dealer that did the work, they were genuine Mazda parts.
#4
Warranty
Yes, according to the receipt from the Mazda dealer that did the work, they were genuine Mazda parts. Just called the dealer - warranty is straight 12 mon/12,000 miles, even for cats. Their price for new pre-cat is $846.72.
Thread
Thread Starter
Forum
Replies
Last Post