Service Engine Soon Light
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Joined: Sep 2003
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Service Engine Soon Light
I have a 2002 Expedition with a 4.6L. My Service Engine soon light has come on, I replaced the gas cap but it did not help. I unplugged the battery for about 30 seconds, but it did not help either. From what I have read it is probably the oxygen sensor, how easy is it to replace it(them)? And where are they located?
Post Fiend
Joined: Jan 1997
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From: Enjoying the real world.
Service Engine Soon Light
Take the SUV down to your local Autozone and get them to read the codes (its free). There are literally hundreds of codes and any number of them could be causing the SES.
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
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From: Washington State
Service Engine Soon Light
Also, your SES light comes on when you have an emmissions problem. Your emmission warranty is longer than you regular warranty.
How many mile you got on your truck?
How many mile you got on your truck?
Logistics Pro
Joined: Oct 2000
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From: All over Texas
Service Engine Soon Light
Originally posted by rmalvarez
I have a 2002 Expedition with a 4.6L. My Service Engine soon light has come on, I replaced the gas cap but it did not help. I unplugged the battery for about 30 seconds, but it did not help either. From what I have read it is probably the oxygen sensor, how easy is it to replace it(them)? And where are they located?
I have a 2002 Expedition with a 4.6L. My Service Engine soon light has come on, I replaced the gas cap but it did not help. I unplugged the battery for about 30 seconds, but it did not help either. From what I have read it is probably the oxygen sensor, how easy is it to replace it(them)? And where are they located?
I agree with Ken and Ken. Find out the specific problem before you randomly start throwing money at possible culprits. To answer your question. There are four O2 sensors, two upstream and two downstream. This means a couple are before the cats and a couple after. They are inserted into the exhuast pipes and look kind of like sparkplugs.
Postmaster
Joined: May 2002
Posts: 3,028
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From: Annapolis, Maryland
Service Engine Soon Light
I would take it to the dealer and have them fix whatever it is under warranty. This truck's too new for you to be throwing money at it.
If it's the O2 sensors, it's a huge PITA. I've almost finished my EOG article on replacing the O2 sensors.
XXL
If it's the O2 sensors, it's a huge PITA. I've almost finished my EOG article on replacing the O2 sensors.
XXL
Senior User
Joined: Nov 2002
Posts: 496
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From: Midwest
Service Engine Soon Light
Definately get the codes read. I believe most of your emmissions are covered til 80,000 miles or so. Since there is only 27,000, you should be good for about everything.
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Freshman User
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Service Engine Soon Light
most emission parts are covered for 7 years or 80000 miles that includes your processor and conver. I don't like it covers egr system
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Postmaster
Joined: May 2002
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From: Annapolis, Maryland
Originally posted by rumedic1
I also had the service engine soon light come on but I was watching the milage turn 100000 and as it did the light activated is this a pre-programed light just to get you in the service center?
I also had the service engine soon light come on but I was watching the milage turn 100000 and as it did the light activated is this a pre-programed light just to get you in the service center?
XXL
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