O2 sensors
01-09-2013, 10:35 PM
#1
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Year: 2000
Model: Cherokee
O2 sensors
Is it worth replacing them? Would I gain some MPG? I have a $50 credit that I need to use on $100+ purchase by Jan 19. Thought it might not be a bad idea to save a few bucks at the pump.
01-09-2013, 10:40 PM
#2
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Year: 1993
Model: Cherokee
Engine: 4.0HO Inline 6
Mine cost me $54 @ Napa.
01-10-2013, 10:50 PM
#6
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Year: 2000
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Is it worth replacing them? Will mpg increase? I'm assimg they are original. Since the jeep oaths winter DD better mpg would be good. I have two $50 off coupons on $100 purchases and I'm tryin to use them as wisely as possible.
01-10-2013, 11:05 PM
#7
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Uh yeah. The computer uses them to set fuel to air ratio after it's warmed up. They're specced for around 60k or 80k mile lifetime.
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01-10-2013, 11:55 PM
#9
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Year: 89' soon to be
Model: Cherokee
Engine: 4.0 HO 167k miles
How old is your cat? Have smog results been good? If you know your cat is starting to go, that O2 sensor won't last as long, along with your egr valve.
01-11-2013, 05:19 AM
#10
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Year: 99
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Engine: 4.0
Yes, O2 sensors are quite important. NTK is the OE supplier. They work in conjunction with your cat. ,other emissions, and with the the computer. I have had two other Jeep. I usually change them at around 100k or when the CEL comes on. They can most certainly affect your MPG's.
01-11-2013, 05:23 AM
#11
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Year: 99
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Yes, O2 sensors are quite important. NTK is the OE supplier. They work in conjunction with your cat. ,other emissions, and with the the computer. I have had two other Jeep. I usually change them at around 100k or when the CEL comes on. They can most certainly affect your MPG's.
01-11-2013, 05:46 AM
#12
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Year: 1999
Model: Cherokee
Engine: 4.0
Replace them. Both of them. The average lifespan of the OEM oxygen sensors on your vintage 4.0 is between 100k and 150k, depending on engine efficiency.
I highly recommend you purchase NTK sensors; they would be the exact same sensors as the ones currently installed on your engine.
I highly recommend you purchase NTK sensors; they would be the exact same sensors as the ones currently installed on your engine.
01-11-2013, 08:36 AM
#13
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Year: 2000
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Thanks for the input guys. Now to clarify I need the two upstream O2 correct? To my knowledge those are the ones that affect MPG, the downstream, after cat O2s just make sure the cat is working correct?