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Service Engine Soon light on 03 Disco II w/ 108K

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  #11  
Old 05-27-2018, 07:10 PM
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Ok, both front ones, not the rear?
Also can I drive the vehicle until I do the repair. I am slated to pull our popup about 100 miles for a camping trip.
 
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  #12  
Old 05-27-2018, 07:26 PM
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Originally Posted by dgm
Ok, both front ones, not the rear?
Also can I drive the vehicle until I do the repair. I am slated to pull our popup about 100 miles for a camping trip.
Should be ok for a little while. Only thing is that your gas mileage might be worse than usual.
 
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  #13  
Old 05-27-2018, 08:29 PM
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Ok, how do we know it's the front and not the rear O2 sensors as well.
 
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Old 05-27-2018, 08:31 PM
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If it's running rough, I wouldn't pull a trailer with it. If that O2 decides to completely fail, you'll get misfires on that bank that could cause damage to the cat and other engine parts.

If the light starts to flash at any time, shut it down and have it towed.
 
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  #15  
Old 05-27-2018, 08:32 PM
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Bank 1 Sensor 1 is up stream. Sensor 1 is always up stream, sensor 2 would be down stream which only checks for catalyst efficiency
 
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Old 05-27-2018, 10:49 PM
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Ok how do I reset the SES light
 
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  #17  
Old 05-28-2018, 09:43 AM
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Probably O2 sensor, but from what you describe I'd also check your vacuum lines. One may have broken or come loose.
If you are changing it out the 02 sensor yourself then make sure you borrow an 02 sensor tool kit from Autozone. If I remember correctly, the front left you do from underneath and the offset tool is invaluable. It's not a tough job IF the last person used the right anti-seize on the threads
 
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Old 05-28-2018, 11:30 AM
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I did the left from up top, right side is super easy. It's definitely an O2 as he's getting a circuit code for the O2, probably shorted or a bad ground
 
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Old 05-28-2018, 11:38 AM
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OK so I buy the two front O2 sensors and the offset tool from AB. Once I get them installed how do I clear the SES light
 
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Old 05-29-2018, 06:44 AM
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Originally Posted by dgm
OK so I buy the two front O2 sensors and the offset tool from AB. Once I get them installed how do I clear the SES light
Get a propane torch as well, and a squirt bottle of water. Heat the crap out of the sensor where it is seated, then squirt it with water to cool it off, then use the tool to get it off. I tried to get mine out without heat, the tool broke.

You can get a cheap obdII tool on Amazon, or they have them at all auto parts store. The Scangauge or Ultragauge can be used to monitor engine temps, etc. so hey are a nearly conpulsory part of your cabin considering the factory temp sensor is garbage.
 
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