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#1
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Po432 - 97 E420
- Main Catalyst below threashold (bank 2).
Which side cat is it talking about?
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With best regards Al |
#2
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Left side (drivers)!
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Thanks - Now for the 02 sensors
OK the car had a clogged cat about a year ago and the guy who had it fitted a universal fit Cat that gave out recently and threw this code. It seems like the cat is falling apart now because its rattling all over the place. The car runs well and has not thrown any other codes so I am thinking that the 02 sensors are bad also and as a result distroyed the cat. The car has 92000 miles on it.
How many O2 sensors are on that side and do I need to replace all of them or just the two that sit in front and behind the cat.
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With best regards Al |
#4
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Hmmmm.....I was told by a well-respected MB mechanic that aftermarket cats won't work on OBD-II cars.
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Paul S. 2001 E430, Bourdeaux Red, Oyster interior. 79,200 miles. 1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron". |
#5
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Aftermarket cats have always been junk. Its just with OBDII, the computer tests them and tells you they are junk.
When all a cat needed to do was take the exhaust down the line, aftermarket did the job. Take a look at any of them, compare to an OEM, weigh them. It doesn't take a research scientist to see the difference. Like many things, one gets what one pays for.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
#6
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California or Federal
Ok so the next question. I just tried to buy a DEC cat and they asked me if my car comforms to Federal or California standards. He said that 99% of cars conform to only Federal however if mine does not, I will burn up the cat. They only sell Federal complient cats.
How do I find out?
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With best regards Al |
#7
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Bit the bullet
Well I called the dealer and asked about the cost of a replacement cat .. The local dealer (RBM) wanted almost 1600 dollars for a replacement saying that the cat itself is 1350 dollars. My old dealer (park place in Dallas) would sell it for 800 and something. I don't care how much better a Mercedes Cat is I am not paying 1500 for a catalytic converter. I took it to the muffler shop recomended by a trusted tech and they looked at the cats. It appears that the factory front cat fell apart and blew into the back cat and hence rattled all over the place. He replaced both cats with high output cats (small and designed for cars up to 6 litres).
Total cost for replacing 2 cats is $450. If it lasts three years it would take me 9 years to break even.
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With best regards Al |
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