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What size is the O2 sensor? Have to pick up a crows foot today. Is there a spec for the torque on it?
Thank you.
Sorry for the delay, no internet at the house.

I do believe it is 7/8 or equivalent metric. Had to use crows foot since my standard O2 socket was not deep enough. Just snugged it down, did not use a torque spec.
 

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Sorry for the delay, no internet at the house.

I do believe it is 7/8 or equivalent metric. Had to use crows foot since my standard O2 socket was not deep enough. Just snugged it down, did not use a torque spec.
The rear O2 is spec'd at 31 ft/lb according to AllData.
 

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Update:
It has been 5 weeks of mostly country driving with a little highway and glad to say no SES light!

Finally sent my SG2 in for updated firmware and will be able to play with it now.
Currently at 15 SGM and 120 total regens.

Still think I'll pull and clean the O2 sensor during oil changes, at a minimum.
 

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My first reaction to this thread was "crap, another thing to fix", but after thinking about it more I'm over that. Even with the sensor tip sooted up, it should not impact the abilty to detect vacuum change. There is no flow involved, otherwise, I would agree it should be cleaned. But as some here have gone nearly 200k miles without replacing or cleaning it, I think the soot is probably just fine (and probably expected).
 

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I pulled my MAP sensor last night and cleaned. Needless to say, it was pretty coated with carbon. I personally think it's a crap shoot whether it will make a difference or not. Its just like the people that keep getting repetitive cels and the people that never have one.......it's hit or miss (knock on wood I haven't had one yet). I don't think it can hurt to clean it, that's for sure.
 

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I pulled my MAP sensor last night and cleaned. Needless to say, it was pretty coated with carbon. I personally think it's a crap shoot whether it will make a difference or not. Its just like the people that keep getting repetitive cels and the people that never have one.......it's hit or miss (knock on wood I haven't had one yet). I don't think it can hurt to clean it, that's for sure.
Try pulling the O2 sensor and cleaning it, made a very big difference on one of mine.

Sent from my Moto G (4) using Tapatalk
 

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Cleaned the MAP and an O2 or EGT sensor today. With pix.

Before and After soaking and cleaning with a soft old tooth brush in gasoline. Blew it off to get rid of the large pieces. Then soaked for a tic, brushed, then blew off again to dry before reinstall. Also attached a pic of the paint can lid I used to clean the MAP and the gunk it left behind.
Did the same with what I thought is the upstream O2 sensor. But didn't get before pix of the O2 sensor. Couldn't figure out how to unplug it so I just cleaned it in the car.
Will see if the mpgs go up next week.
 

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well dang. Now I keep getting random errors popping up. Probably something to do with the O2/EGT sensor I cleaned. I don't think they are related to the MAP.

P14CC is one of the codes I remember. I think another was P116b... seems really random. I remember one had to deal with a NOx sensor so maybe that's what I cleaned instead of the O2! lol... Never on the first start/drive, seems always on the second. Hopefully it settles down.
 

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Drove the CTD yesterday. No codes. DEF down to 35%. time to refill. found a truckstop sells bulk for $2.99/gal. took 3.927 Gallons to top off. 11k miles for only $11, not too bad for DEF.
 

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When you clean those types of components you need to use something like MAF cleaner which is designed to dry without leaving residue.
 

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cleaned mine first time today with maf cleaner, was black, but not built up or anything like the egr
Did you notice any difference in performance/milage.
While trying to decide if it's worth the risk to pull and clean this for the first time at 145k miles, as the original owner. I question is it simply a vacuum/pressure detector why would it extend into the exhaust flow to get sooty.
 

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Did you notice any difference in performance/milage.
While trying to decide if it's worth the risk to pull and clean this for the first time at 145k miles, as the original owner. I question is it simply a vacuum/pressure detector why would it extend into the exhaust flow to get sooty.
I'm still debating on if I want to do mine at all. I've thought about doing it at the same time as the EGR. But unless I'm misunderstanding the sensor, I can't see why being soot covered would hinder it's ability to sense a vacuum. It's not like a MAF where the function is based on airflow.
 

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Did you notice any difference in performance/milage.
While trying to decide if it's worth the risk to pull and clean this for the first time at 145k miles, as the original owner. I question is it simply a vacuum/pressure detector why would it extend into the exhaust flow to get sooty.
dont notice a difference.
 

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I have cleaned mine now and haven't noticed a difference, but I also rotated my tires. I was careful to give it several very gentle twists before attempting to pull it out. I didnt get it out too far before deciding to add a bit of lubricant for the o-ring, I chose pb blaster as it was close and I was going to be cleaning it off anyway. I had more concerns trying to get it back in seems the hole had some "crusty stuff" nothing a rag covered screwdriver could wipe loose, then vacuum out.
 

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Fuel mileage loss, fix = clean the Map Sensor again.
I might just buy a couple of them and replace it every 12 months while cleaning every six months.
I have never had to do such a thing to any other vehicle I have owned. I have never owned a boosted car before.
Cheers.
Hi
I am having this issue right now were I cant get fuel range or how many KM left in the tank. Is this sensor that you mentioned causing this problem??
Thanks
 

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