Car spent 3 days in the shop..
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
Car spent 3 days in the shop..
Ever since about a month after getting my car I have had random CEL lights come on and go off all by themselves. The light came on last Friday and was off again by Monday. I took it to my Mercedes dealer to let them trouble shoot it. The light was off when I dropped it off on Wed but these were the stored codes.
1351- Mass Air Flow Sensor 1 has a malfunction
374A- The internal data could not be stored in the control unit.
3741- Mass Air flow sensor 2 has a malfunction
3690- Component Left Hot Film Mass Air Flow sensor has a short to ground
Dealer checked all components, testing wiring, between both mass air sensors and ECU for resistance, short, or crossed wiring ALL CHECK OK. They could not find the cause of the error and released the car back to me and told me to come back if the light comes back on.
All of these codes have been logged in the last 700 miles since my 50k service. I asked them to check at that time and they saw the P0101 but it was not active at that time so they cleared all codes.
1351- Mass Air Flow Sensor 1 has a malfunction
374A- The internal data could not be stored in the control unit.
3741- Mass Air flow sensor 2 has a malfunction
3690- Component Left Hot Film Mass Air Flow sensor has a short to ground
Dealer checked all components, testing wiring, between both mass air sensors and ECU for resistance, short, or crossed wiring ALL CHECK OK. They could not find the cause of the error and released the car back to me and told me to come back if the light comes back on.
All of these codes have been logged in the last 700 miles since my 50k service. I asked them to check at that time and they saw the P0101 but it was not active at that time so they cleared all codes.
MBWorld Fanatic!
Joined: Nov 2009
Posts: 4,438
Likes: 388
From: Relocated
2010 Irridium Silver MB C63 AMG Sedan
Why is there so many facelift cars having electronic, transmission, cabin squeak, brake squeak, air leak issues? Pre FL all we have are headbolts....????
Hope all gets fixed...
Hope all gets fixed...
MBWorld Fanatic!
Joined: Nov 2012
Posts: 2,768
Likes: 419
'10 C63
Any airbox mods? When i ran aFe filters and charcoal deletes on my stock US boxes I got some kind of MAF CEL. I don't remember the exact codes. Once I swapped to ROWs, the CELs went away. And I had a 374a once. I think I read that one doesn't really matter.
Trending Topics
MBWorld Fanatic!
Joined: Nov 2009
Posts: 4,438
Likes: 388
From: Relocated
2010 Irridium Silver MB C63 AMG Sedan
Not sure, but it seems with the:
1. Cooling issues
2. Cabin creaks
3. Brake squeals
4. Transmission jerks
5. Air leaks
...Something is not right
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
I have had none of those issues and 95% of the time my car has been perfect. I just get a random light that comes on from time to time and its always P0101. Clearly its something to do with the mass air sensors.
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
Member
Joined: Mar 2009
Posts: 175
Likes: 0
From: TX
2013 C63
Yeah I have seen lots of the posts and threads made but it isn't that many people who have these. Granted there are way more factors involved than are accounted for. Even looking at all my service documentation, there isn't anything the dealer finds when they had my car in for service either. Maybe it's just luck....haha
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
Yeah I have seen lots of the posts and threads made but it isn't that many people who have these. Granted there are way more factors involved than are accounted for. Even looking at all my service documentation, there isn't anything the dealer finds when they had my car in for service either. Maybe it's just luck....haha
Member
Joined: May 2016
Posts: 130
Likes: 37
From: Oxford, UK
GLC63S, A35 AMG
These are the actual descriptions for the M156 - a bit more descriptive, which might help.
---
1351- Measured air mass from the right unreliable in comparison with the position of the throttle. (P0101)
374A- Failed to save the internal data in the control unit.
3741- Left thermoanemometric air flow sensor measures the mass of air is too large. / HFM signal duration period on the left is too high. (P010B)
3690- B2 / 6 (Hot-air mass flow meter on the left): open / short to ground or plus (P010C)
---
The only time I've seen P374A on my own car was when the battery was a bit low. Charged it for 24 hours on a battery conditioner and haven't seen it since. I think it's a tell-tale that battery voltage isn't where it needs to be, but nothing more than that.
Wondering out loud - check your Right air intake pipework for blockages that might cause the engine to pull too much air through the left, and not enough through the right...
---
1351- Measured air mass from the right unreliable in comparison with the position of the throttle. (P0101)
374A- Failed to save the internal data in the control unit.
3741- Left thermoanemometric air flow sensor measures the mass of air is too large. / HFM signal duration period on the left is too high. (P010B)
3690- B2 / 6 (Hot-air mass flow meter on the left): open / short to ground or plus (P010C)
---
The only time I've seen P374A on my own car was when the battery was a bit low. Charged it for 24 hours on a battery conditioner and haven't seen it since. I think it's a tell-tale that battery voltage isn't where it needs to be, but nothing more than that.
Wondering out loud - check your Right air intake pipework for blockages that might cause the engine to pull too much air through the left, and not enough through the right...
Super Member
Joined: Nov 2013
Posts: 825
Likes: 114
From: Eufaula, Al/Georgetown, GA
W213 E63S Wagon, W204 C63 P30(RIP), WK1 Grand Cherokee SRT8(RIP)
quick question as i am not sure if they even exist, but are your aFe filters dry filters or are they oiled filters like K&N?
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
Member
Joined: Jul 2010
Posts: 166
Likes: 9
From: Castle Rock, CO
'21 GLE53, ‘11 E63, '13 M3
What Wiggis said about battery/voltage! How old is your battery?
I was having issues in my E60 M5 with the SMG throwing codes out of its ****. Slightest voltage drop would make it go into limp mode. Ended up purchasing a new AGM battery and all was well.
Given that the vehicle is a '13, it is worth checking battery if it's the original one.
Good luck man!
I was having issues in my E60 M5 with the SMG throwing codes out of its ****. Slightest voltage drop would make it go into limp mode. Ended up purchasing a new AGM battery and all was well.
Given that the vehicle is a '13, it is worth checking battery if it's the original one.
Good luck man!
These are the actual descriptions for the M156 - a bit more descriptive, which might help.
---
1351- Measured air mass from the right unreliable in comparison with the position of the throttle. (P0101)
374A- Failed to save the internal data in the control unit.
3741- Left thermoanemometric air flow sensor measures the mass of air is too large. / HFM signal duration period on the left is too high. (P010B)
3690- B2 / 6 (Hot-air mass flow meter on the left): open / short to ground or plus (P010C)
---
The only time I've seen P374A on my own car was when the battery was a bit low. Charged it for 24 hours on a battery conditioner and haven't seen it since. I think it's a tell-tale that battery voltage isn't where it needs to be, but nothing more than that.
Wondering out loud - check your Right air intake pipework for blockages that might cause the engine to pull too much air through the left, and not enough through the right...
---
1351- Measured air mass from the right unreliable in comparison with the position of the throttle. (P0101)
374A- Failed to save the internal data in the control unit.
3741- Left thermoanemometric air flow sensor measures the mass of air is too large. / HFM signal duration period on the left is too high. (P010B)
3690- B2 / 6 (Hot-air mass flow meter on the left): open / short to ground or plus (P010C)
---
The only time I've seen P374A on my own car was when the battery was a bit low. Charged it for 24 hours on a battery conditioner and haven't seen it since. I think it's a tell-tale that battery voltage isn't where it needs to be, but nothing more than that.
Wondering out loud - check your Right air intake pipework for blockages that might cause the engine to pull too much air through the left, and not enough through the right...
Thread Starter
Super Member
Joined: Oct 2016
Posts: 703
Likes: 81
From: Destin FL
2018 E63 AMG S
I believe that it is the factory battery but I have no way of knowning for sure.. Right now the car is running like a scaled ape. The light is very intermittent.. as in it can be fine for weeks then comes the light that may stick around for a few days and then go out on its own.
Member
Joined: Jul 2010
Posts: 166
Likes: 9
From: Castle Rock, CO
'21 GLE53, ‘11 E63, '13 M3
It would be worth getting the battery tested.
Mileage on vehicle?
Mileage on vehicle?
I believe that it is the factory battery but I have no way of knowning for sure.. Right now the car is running like a scaled ape. The light is very intermittent.. as in it can be fine for weeks then comes the light that may stick around for a few days and then go out on its own.
