2004 Chrysler Pacifica P2096

CAR4424

MEMBER
2004 CHRYSLER PACIFICA
3.5L
V6
2WD
AUTOMATIC
13,000 MILES

Denso o2 sensor every year I get this code this time it made it one year other times it makes it 8 to 10 months. The car runs fine like always. Last week had converter changed it was plugged. They replaced down stream o2 sensor they said it had a ding in it from pieces of the cat coming out. The upstream one is the one I have to replace every year. Went back the other day when I noticed that the muffler pipe has a slit on the top and bottom and when the shop put the cat pipe into the muffler and welded it he missed the slit in the pipe so I had him weld it shut. This is after the cat and should have nothing to do with it. I put my hand around the exhaust pipe connection and couldn't feel any leak and it is quiet. Is it just a freak thing with the ECU that when the o2 sensor gets about a year old it gets lazy and doesn't give the ECU up to date readings and the computer gives a code?

10 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

Are you burning oil or using excessive fuel?Those are two main things that cause a cat or o2 sensors to go bad.

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Wednesday, June 4th, 2014 AT 1:07 PM

CAR4424

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36 POSTS

The car uses a quart every 2,500 miles and the antifreeze is full. The fuel mileage is about the same I drive it hard I get 19 city and 22 to 25 highway depending if the air is on

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Thursday, June 5th, 2014 AT 5:50 AM

SATURNTECH9

MECHANIC
30,870 POSTS

Burning oil can take out a o2 sensor especially the one right out of the exhaust manifold f the engine.

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Thursday, June 5th, 2014 AT 6:16 AM

CAR4424

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36 POSTS

Manufactures state there is no oil use problem unless it is less that 800 miles per quart and this is the same amount I have used since I bought it and have put 100,000 miles. There is an exhaust manifold on the back side of the engine and that connects to the front one on the drivers side and then the pipe comes down the passenger side and ends at the back of the block. The pipe connected to the converter connects here the pipe before the converter is about two feet long

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Thursday, June 5th, 2014 AT 7:07 AM

SATURNTECH9

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30,870 POSTS

That is oil consumption specs for what the manufacturer says is normal not for what will damage a cat or o2 sensor over time. The excessive fuel and burning oil are really the only things I have seen take out o2s and cats early.

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Thursday, June 5th, 2014 AT 8:33 AM

CAR4424

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36 POSTS

If this is the same oil consumption I've had for the life of the car why did it start at 100,000 miles it was fine before that

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Thursday, June 5th, 2014 AT 8:50 AM

CAR4424

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36 POSTS

Also my wife has the same car and uses the same amount of oil and never had this code she has 102,000 on hers

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Thursday, June 5th, 2014 AT 8:54 AM

CAR4424

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36 POSTS

I looked at my first post it's 130,000 not 13,000

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Thursday, June 5th, 2014 AT 9:49 AM

SATURNTECH9

MECHANIC
30,870 POSTS

I looked at fixs for that code and found bad cats o2 sensors and vacuum leaks.I would also make sure there is no loose connections or terminals to the o2 sensor.

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Thursday, June 5th, 2014 AT 7:04 PM

CAR4424