2002 3.9L o2 sensor code
2002 3.9L o2 sensor code
How many o2 sensors does the 2002 dakota v6 have? Is this something I can replace at home or is it better to pay someone to do this for me? My exhaust is blowing out raw gas and I took it to a mechanic and he said it was my o2 sensor. Any help is appreciated (ecspecially a link with detailed pictures or video). thanks in advance guys
4 total. One on each cat before and after it. The 2 after the cat are easy - the 2 before are a total bitch.
I just had mine replaced at a mechanic just because my truck wasn't drivable (long story).
I just had mine replaced at a mechanic just because my truck wasn't drivable (long story).
Record Breaker
Joined: Jun 2008
Posts: 1,970
Likes: 20
From: Clermont, Florida
Yep there is one before and one after each catalytic convertor on each exhaust pipe. Usually you don't always have to replace the downstream O2's, those are the ones after the cats and they don't really do much of anything. It's the upstream O2's that send the important signals to the PCM.
I replaced both of my own upstream O2's at about 80,000 miles. I had no codes or anything for it, I just replaced the O2's and my MAP sensor all as preventative maintenance. It helped my power and MPG. My truck has over 150,000 miles on it now and still is doing fine, as far as the O2's are concerned. I ordered my O2's from the NTK web site, paid about $65.00 shipped for both. NTK or the OEM Mopar sensors work best. NTK is the supplier for Mopar, but Mopars cost a lot more at the Dodge dealer.
I also bought a $10.00 O2 sensor socket at Harbor Freight, which made it pretty easy to R&R the sensors. I sprayed mine with PB Blaster several times during the night before the day I did the job, it helped loosen the sensors out of their bungs on the exhaust pipe. It also helps to get the sensor that is a direct replacement, with the plug connector already on the wire end. Splicing is a hassle trying to decipher which wire goes where and you don't have a lot of room to work under the truck to begin with.
Just my 2 cents.
Jimmy
I replaced both of my own upstream O2's at about 80,000 miles. I had no codes or anything for it, I just replaced the O2's and my MAP sensor all as preventative maintenance. It helped my power and MPG. My truck has over 150,000 miles on it now and still is doing fine, as far as the O2's are concerned. I ordered my O2's from the NTK web site, paid about $65.00 shipped for both. NTK or the OEM Mopar sensors work best. NTK is the supplier for Mopar, but Mopars cost a lot more at the Dodge dealer.
I also bought a $10.00 O2 sensor socket at Harbor Freight, which made it pretty easy to R&R the sensors. I sprayed mine with PB Blaster several times during the night before the day I did the job, it helped loosen the sensors out of their bungs on the exhaust pipe. It also helps to get the sensor that is a direct replacement, with the plug connector already on the wire end. Splicing is a hassle trying to decipher which wire goes where and you don't have a lot of room to work under the truck to begin with.
Just my 2 cents.
Jimmy