Did basic maintenance, now emmisions problem?
Thread Starter
Member
Joined: Mar 2015
Posts: 239
Likes: 39
From: Vancouver
14 GLK 250
Did basic maintenance, now emmisions problem?
2014 GLK 250 Canada
Changed Oil, Oil filter, fuel filter, Air filter, Cabin filter yesterday, topped up DEF fluid 3 days ago.
On my way home after the check engine light showed up, pulled the generic code, Nox Sensor P229F. Cleared it, turns off, then comes back next time you start the car. Tried using Carly for Mercedes with no luck on the better scan of code. 40 Km later driving down highway, the "adblue 10 starts remaining" appears.
Am i crazy and this is bad timing? How can the basic service cause this? Used the ISO certified Def Fluid and all proper OEM parts and Oil.
Ordered the Icarsoft MB2 to do a proper scan of the vehicle in a few days.
But for now its parked
May need to take it to dealer
Anyone have any thoughts or ideas?
Thanks in advance
Changed Oil, Oil filter, fuel filter, Air filter, Cabin filter yesterday, topped up DEF fluid 3 days ago.
On my way home after the check engine light showed up, pulled the generic code, Nox Sensor P229F. Cleared it, turns off, then comes back next time you start the car. Tried using Carly for Mercedes with no luck on the better scan of code. 40 Km later driving down highway, the "adblue 10 starts remaining" appears.
Am i crazy and this is bad timing? How can the basic service cause this? Used the ISO certified Def Fluid and all proper OEM parts and Oil.
Ordered the Icarsoft MB2 to do a proper scan of the vehicle in a few days.
But for now its parked
May need to take it to dealer
Anyone have any thoughts or ideas?
Thanks in advance
Newbie
Joined: Oct 2007
Posts: 14
Likes: 0
2014 GLK250
Coincidence.
I do not see how any of these actions would have contributed to this fault code. I had this code come up on my 2104, and it required the replacement of one of my NOX sensors. That was at 30,000 miles. I have not has a problem since then at 48,000 miles.
Have you ever had any of the NOX sensors replaced? How many kilometers on your car presently? I suppose you are past warranty, unless this would be covered under emissions warranty?
John
I do not see how any of these actions would have contributed to this fault code. I had this code come up on my 2104, and it required the replacement of one of my NOX sensors. That was at 30,000 miles. I have not has a problem since then at 48,000 miles.
Have you ever had any of the NOX sensors replaced? How many kilometers on your car presently? I suppose you are past warranty, unless this would be covered under emissions warranty?
John
Thread Starter
Member
Joined: Mar 2015
Posts: 239
Likes: 39
From: Vancouver
14 GLK 250
Coincidence.
I do not see how any of these actions would have contributed to this fault code. I had this code come up on my 2104, and it required the replacement of one of my NOX sensors. That was at 30,000 miles. I have not has a problem since then at 48,000 miles.
Have you ever had any of the NOX sensors replaced? How many kilometers on your car presently? I suppose you are past warranty, unless this would be covered under emissions warranty?
John
I do not see how any of these actions would have contributed to this fault code. I had this code come up on my 2104, and it required the replacement of one of my NOX sensors. That was at 30,000 miles. I have not has a problem since then at 48,000 miles.
Have you ever had any of the NOX sensors replaced? How many kilometers on your car presently? I suppose you are past warranty, unless this would be covered under emissions warranty?
John
Super Member
Joined: Aug 2008
Posts: 689
Likes: 30
Right about the emissions warranty. Doesn't cover much. Just DPF, catalysts, ECU and Instrument display. More recently Soot sensor warranty extended to 10 years.
Our GLK250 has the extended warranty, but even that only adds the Adblue system.
Did you own a Mercedes before? Sometimes if you are a long term MB owner, they do offer some repairs under Goodwill. But, you need to have a good relationship with dealer! They are very aware of the NOx sensor problem. BTW, those sensors are close to $1000 each and my dealer says they should be changed in pairs. Close to $3k incl labour and tax.
There is a small chance that the fault may be able to be corrected by a software update. Many owners had that 10-start issue even with new 2014s. It was due to the software being overly-sensitive to NOx sensor readings. On my car, I had them update the software not long after I bought the car. As a result, never had that problem.
Our GLK250 has the extended warranty, but even that only adds the Adblue system.
Did you own a Mercedes before? Sometimes if you are a long term MB owner, they do offer some repairs under Goodwill. But, you need to have a good relationship with dealer! They are very aware of the NOx sensor problem. BTW, those sensors are close to $1000 each and my dealer says they should be changed in pairs. Close to $3k incl labour and tax.
There is a small chance that the fault may be able to be corrected by a software update. Many owners had that 10-start issue even with new 2014s. It was due to the software being overly-sensitive to NOx sensor readings. On my car, I had them update the software not long after I bought the car. As a result, never had that problem.
Super Member
Joined: Aug 2008
Posts: 689
Likes: 30
I have had it done a couple of times - once, my local dealer just charged me for 1/2hr labour. At another time, different dealer, 0.92hrs ($78 at time!) That was to determine cause of Check Engine light. Perhaps $240 is for a full diagnostic?
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Thread Starter
Member
Joined: Mar 2015
Posts: 239
Likes: 39
From: Vancouver
14 GLK 250
Hopefully they will not charge that much if you get them to do the repair. $240 seems excessive.
I have had it done a couple of times - once, my local dealer just charged me for 1/2hr labour. At another time, different dealer, 0.92hrs ($78 at time!) That was to determine cause of Check Engine light. Perhaps $240 is for a full diagnostic?
I have had it done a couple of times - once, my local dealer just charged me for 1/2hr labour. At another time, different dealer, 0.92hrs ($78 at time!) That was to determine cause of Check Engine light. Perhaps $240 is for a full diagnostic?
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Super Member
Joined: Aug 2008
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I am in Ontario, but not in GTA where the dealerships are owned by MBCanada and may do the same thing. Our local dealership is family owned. They know me, so I just call the Service manager or drop in and talk to them. Even for you, it might be worth talking to service guys face to face.
Thread Starter
Member
Joined: Mar 2015
Posts: 239
Likes: 39
From: Vancouver
14 GLK 250
Just as an update. So at this point I’m at 99% sure the the basic service cause all my issues. Let me explain.
When the fuel filter was changed I reused the 2 clips that hold the hose to the fuel filter. Well there was a tiny leak. DO NOT RESUSE THE CLIPS.
Scanning with a basic OBD scanner shows the basic code of P229F which is Nox sensor bank 2. It seems that Mercedes is pretty tricky in that it shows that code for basically any emissions issue.
Using icarsoft MB2 and also Carly for Mercedes that are able to read the exact Mercedes codes and problems showed a different code which stated: “fuel pump flow implausible”
replaced the clips with new ones and confirmed no leak and cleared all codes. So far have driven 350km with no problem. Have monitored the output parameters and all senors seem to be working ok and within spec.
Now there is the permanent code still stored in the Ecu until a complete drive cycle is done. I have been monitoring that and am down to just the dpf to complete. Everything else passed.
Hope this helps anyone else because calling a few places over the phone they were sure it was the nox sensors and wanted me to come in right away to change them for 2000$.
When the fuel filter was changed I reused the 2 clips that hold the hose to the fuel filter. Well there was a tiny leak. DO NOT RESUSE THE CLIPS.
Scanning with a basic OBD scanner shows the basic code of P229F which is Nox sensor bank 2. It seems that Mercedes is pretty tricky in that it shows that code for basically any emissions issue.
Using icarsoft MB2 and also Carly for Mercedes that are able to read the exact Mercedes codes and problems showed a different code which stated: “fuel pump flow implausible”
replaced the clips with new ones and confirmed no leak and cleared all codes. So far have driven 350km with no problem. Have monitored the output parameters and all senors seem to be working ok and within spec.
Now there is the permanent code still stored in the Ecu until a complete drive cycle is done. I have been monitoring that and am down to just the dpf to complete. Everything else passed.
Hope this helps anyone else because calling a few places over the phone they were sure it was the nox sensors and wanted me to come in right away to change them for 2000$.
Super Member
Joined: Aug 2008
Posts: 689
Likes: 30
Just as an update. So at this point I’m at 99% sure the the basic service cause all my issues. Let me explain.
When the fuel filter was changed I reused the 2 clips that hold the hose to the fuel filter. Well there was a tiny leak. DO NOT RESUSE THE CLIPS.
Hope this helps anyone else because calling a few places over the phone they were sure it was the nox sensors and wanted me to come in right away to change them for 2000$.
When the fuel filter was changed I reused the 2 clips that hold the hose to the fuel filter. Well there was a tiny leak. DO NOT RESUSE THE CLIPS.
Hope this helps anyone else because calling a few places over the phone they were sure it was the nox sensors and wanted me to come in right away to change them for 2000$.
Hopefully, for those without those scanners, a dealer would have found same thing once hooked to their Star/DAS system. But great to be able diagnose yourself.
Thread Starter
Member
Joined: Mar 2015
Posts: 239
Likes: 39
From: Vancouver
14 GLK 250
Not enough to see actual flow, but diesel fuel on the inside rim of the fuel filter, which meant it was leaking. But if you hook up a parameter monitor and check your fuel pressure parameter you will see that the pressure is VERY exact, I think the computer would easily sense a drop in pressure of even 2-5%.
