Mercedes-Benz W166 ML350 Bluetec NOx sensors replacement P229F CEL
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- čas přidán 7. 09. 2024
- I got a CEL with code P229F and there was a lot of white smoke and strong ammonia smell. The CEL means one of the NOx sensors were bad so I decided to replace both front and back. After replacing the sensors they had to be re-calibrated. I tried an independent mechanic but their scanner could not do it. The local Mercedes-Benz dealer did a software update and also re-calibrated the sensors. They also said the car is reporting P205C so I have to replace the Adblue pre-heater. I will be replacing that soon.
Excellent work. Thanks for your help and advice 👍👍👍
Superb Video - Thank You !
This is awesome info, thanks Ken!! Please keep upload W166 Fix video!
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@Sage Zayn i would suggest flixzone. Just search on google for it =)
@Sage Zayn i would suggest flixzone. You can find it on google =)
*** IMPORTANT***
Hi everyone, their has been a re-call for all ML250 ECU SOFTWARE. Im in melbourne australia and we had limited kms remaining, dashboard also said ADBLUE and NOX sensor. The car ECU also locks out anyone from making any changes so both NOX sensors will need replacing for free to be able to do software update.We almost spend several thousand dollars at private mechanic, lucky we rang mercedes. All the best
Hi Raz, do you have the info of the recall? my NOX sensors failed on my ML250 and after clearing codes, keep coming back. by the way did you get notified or did you just happen to call your MB dealers?
Thanks Raz for this info. Had engine light come on and error p229f . Found this video and read the comments. Just had ours in to mercedes to have the ecu upgrade , new nox sensors go in next week , all under recall warranty by Mercedes. I had to ring and ask about the recall. 2k worth of work. 2015 ml 350 bluetec.
@@blackadder2150 Hi Blackadder (legend of a show). I also have an 2015 ML350 BT but have never been advise by MB service centre of recall or offer for nox replacement. Do you have some details on the recall or which MB you use.
@@lillabellaox Hi Lilla , no MB will not advise or contact you. If you are getting the error codes as mentioned (p229f) or you keep getting an engine light on which is very easy to get any mechanic to diagnose if you dont have the tools. I found out about the recall on an American mercedes forum. I then rang Mercedes in Hornsby and asked them about it, they asked me to bring the car in , they then agreed there was an issue and booked the car in 2 weeks later to do the work. Excellent customer service from them.
They only did the ecu updated for free. Not the sensors
Thanks this is helpful. It was easy to get to the downstream NOX sensor but not the one closest to the DPF filter.
Great video, Ken. Was the nox sensor by the cat noticeably dirty and full of soot or did it look normal? I currently have the same code with the CEL and have slightly increased fuel consumption but no other noticeable symptoms. The sensors are on backorder in the EU and while I await for new parts (was told upwards of a month), I was wondering if popping the probe out and soaking it in carbon cleaner overnight might do the trick.
Hi, mine was just black, not covered in thick build up of carbon. I did try soaking overnight with a cleaner, it didn't help me though.
1. Could one be lasy and just clip the new sensors to the new box?
2. Do you khnow where the adlue injedtors is ats
hi, I am not sure what you mean. Use old circuit board new sensor? I wouldn't 😀
the injector is further towards the front of the exhaust. go to partsouq.com enter your VIN and you get pretty good diagrams. good luck
@@kenkanfix yeah I was referring to the circuit board :) Thank you for that site! My trouble codes state trouble communicating with each sensor...the the symptoms are the dreaded Adblue countdown (only 10 starts left, refill adblue) though when I filled it up, the countdown kept going, it's now at 0 starts remaining. I'm not sure what to do now.
YES BECAUSE TI COSTED ME £ 2214 TO GET THE NOX SENSOR FIXED FROM BIRMINGHAM DEALERSHIP UK
Nice!!!
Hi, thank you for video, please is there possibility that Fuse F110 is damaged and NOx is just fine in general?
Hi, no, the fuse is fine since adblue was still being delivered in the exhaust. The problem was the nox sensors were bad and too much adblue was being delivered into the exhaust.
@@kenkanfix well i am asking coz i am having this problem right now. I was asked to change not specific one..but to buy 2 pcs actually as diagnostic can not specify if front Nox is bad or rear one is..which is pretty stupid isnt it. So basicly you thrash 1 potentionaly good Nox just to be sure.
hi, if you have the right scanner it should tell you which one. In my case I changed both because I figured if one has failed the other will fail soon so I replaced both. I also had to replace the adblue heater.
Can you tell me please front and rear sensors part number 🙏🏻
Thanks 😊
Hi how old hi how old is your ML ? I have 2007 ML350 wondering if it’s the same .
What was your symptoms mine has white burn smell smoke have 3 different codes . Trying to figure out if it’s this front sensor on the catalytic converter , the white smoke seems coming right from the sensor
Hi, mine is 2015 (w166 chassis). the symptoms were white smoke and strong ammonia smell.
@@kenkanfix any code for the sensor ? I think mine is just camshaft plug dripping oil on the sensor. I’m going to change the plug first it’s $8 than I see If I need to change the sensor which Denso is up to $270 for one here in napa auto parts but saw online for $99 still a lot for 1 sensor.
@World Fitness Trainer Radek Vesely hi, is your car diesel or petrol? the petrol ml350 does have camshaft plug which do need replacing if you see oil drip on to the exhaust. There's no code for that.
@@kenkanfix Hi yes petrol, already ordered it but now got worse nightmare, was cleaning oil with a screw driver and a rad over it and had to break one of the manifold plastic because after I’ve got code P2006 .it’s cheap part but so much work to remove the manifold ..
what do you mean have to be re-calibrated? is it same as fault code cleared?
Hi, no, it is not the same as clearing the fault code. Have a look at this link czcams.com/video/PEH0-xdF4Yc/video.html it talks about initializing NOx sensors after replacing. The mechanic I took my car showed me his scanner it has re-calibrate option.
thanks for this info
Howmuch is Nox sensor. Did you get it from the dealer?
Hi, I my MB Nox sensors from AutohausAZ.com for less than US$1200. The local MB dealer in Australia wanted nearly AUD$5000 for same sensors.
@@kenkanfix $5,000 is a ridiculous price. I'm having very high rear nox sensor reading with my ML350 BT. I don't bother the dealers, I have my own Xentry. Another Aussie ML350 BT owner.
@@ccfabs8932 hi can you please post where you buy Xentry. I mean Website thanks
Be prepared to pay several thousand dollars. And this is a repair bill that will occur every year with AdBlue system.