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How many catalytic converters are on there?

Tiny
SMIBIT88
  • MEMBER
  • 2005 FORD EXPEDITION
  • 97,000 MILES
How many catalytic converters are on the drivers side of the 2005 Expedition? I'm being told that there are four converters on the vehicle, two in the front on both sides and two in the back on both sides I need to change them
Tuesday, August 13th, 2013 AT 3:03 PM

19 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Here is a guide to help walk you through the cat replacement with instructions in the diagrams below for your car.

https://www.2carpros.com/articles/catalytic-converter-replacement

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Wednesday, August 14th, 2013 AT 6:27 AM
Tiny
HUBERTWMS
  • MEMBER
  • 9 POSTS
  • 2003 FORD EXPEDITION
  • 4.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 150 MILES
Differential axel is leaking oil.I recently changed the oil, 70-145 weight. I found oil on my front left wheel quite a bit. Its also getting on my catalyt converter
My Options: rebuild or replace?. And if it's a seal that needs to be replaced?
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Saturday, May 23rd, 2020 AT 4:43 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Clean oil off everywhere first to get a better idea of where it is coming from more than likely the cover and an axle seal. Repair both.
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Saturday, May 23rd, 2020 AT 4:43 PM (Merged)
Tiny
HUBERTWMS
  • MEMBER
  • 9 POSTS
Thank you Sir!
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Saturday, May 23rd, 2020 AT 4:43 PM (Merged)
Tiny
WEENIE
  • MEMBER
  • 3 POSTS
  • 2003 FORD EXPEDITION
Noises problem
2003 Ford Expedition 6 cyl Two Wheel Drive Automatic

My truck has 2. What is the expected life span of the convertor and would it be standard operating procedure to replace both if one is bad?
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
That depends on the engine and the fuel you've used. If the engine starts burning oil a catalytic converter can fail rapidly. Some fuel additives can also cause a catalytic converter to fail prematurely due to incorrect fuel/air ratio. Typically, cat. Converters last the duration of the vehicle's life.
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
WEENIE
  • MEMBER
  • 3 POSTS
One of them was replaced when I bought the vehicle a couple months ago. Now the other one is making the same noise. Would it stand to reason the if one was bad that both would have been bad?
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Yes most likely both were bad, but my concern would be why either failed in the first place. A failing converter usually indicates an issue with the fuel/air ratio as I stated before. Most commonly one or more of the oxygen sensors failing is the reason for the cat. Converter to fail. Is the engine light on?
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
WEENIE
  • MEMBER
  • 3 POSTS
No warning lights are on. Seems to be running ok. No excess fuel smell. What else could I be looking for?
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
MATT THE RAT 123
  • MEMBER
  • 1 POST
  • 2000 FORD EXPEDITION
  • 100,000 MILES
Does anyone have tips or recommendations on soaking catalytic converters when off the car, I removed them because car wouldn't start, once off it started right up, I've seen some being soaked in laundry detergent, yay or nay Anyone?
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Could have slight misfire of engine due to weak spark plugs / wires. Also ensure engine oil and coolant are not leaking. May want to test the oxygen sensors as well, even though engine light is not on.
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
I never heard of anyone that was successful cleaning them. They usually melt down internally when they go bad. I recommend getting a direct fit replacement.
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
APCALDERON
  • MEMBER
  • 5 POSTS
  • 2000 FORD EXPEDITION
  • V8
  • 2WD
  • AUTOMATIC
  • 204,000 MILES
Will your converter malfunction in cold weather only and not in worm weather
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
No, if it is faulty, it will be so all the time.

Mark (mhpautos)
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
APCALDERON
  • MEMBER
  • 5 POSTS
Only on cold weather my truck idole is low like if it wants to turn off but it wont turn off
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
APCALDERON
  • MEMBER
  • 5 POSTS
Check eng. Light is on and had it check out in the auto parts and told me it was the o2 sensers had already changed the top two before the cadillac converter
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Often the O2 sensor will show up due to other problems, parts sellers just aren't techs, you will have to look into the tune side of things leaky injectors, vacuum leaks, faulty plugs, leads any significant tune issue car cause an O2 sensor to go out of range and set a code.

Mark (mhpautos)
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
APCALDERON
  • MEMBER
  • 5 POSTS
My expedition idle is low like it wants to turn off can it be the idle air control valve
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)
Tiny
APCALDERON
  • MEMBER
  • 5 POSTS
How can I check to see if its not working properly
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Saturday, May 23rd, 2020 AT 4:44 PM (Merged)

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