M278 faultcode P13B200 P13B300
Thread Starter
Newbie
Joined: Apr 2024
Posts: 9
Likes: 3
From: Germany
W212 E500 M278
M278 faultcode P13B200 P13B300
Hello Community,
I have overhauled the complete M278 engine and have driven 500km, now the vehicle stops sporadically and after a few minutes
it runs again without any problems.
The following errors are stored: P13B200, P13B300
Can anyone help me?
I have overhauled the complete M278 engine and have driven 500km, now the vehicle stops sporadically and after a few minutes
it runs again without any problems.
The following errors are stored: P13B200, P13B300
Can anyone help me?
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
An M278 stalls now and then after repair... the fact codes are STORED is a bit odd.
walk components around to see if codes follow.
Fuel or spark ?? I lean towards electrical issue more so than a fuel delivery
Perhaps coil connectors are now too open/loose?(that wouldn't stop an engine!)
What is the mileage?
What was wrong with this engine before repairs? Could this be related to the "previous issue"?
Tied to extreme-heat condition... ?
CPS... wet or dry?
walk components around to see if codes follow.
Fuel or spark ?? I lean towards electrical issue more so than a fuel delivery
Perhaps coil connectors are now too open/loose?(that wouldn't stop an engine!)
What is the mileage?
What was wrong with this engine before repairs? Could this be related to the "previous issue"?
Tied to extreme-heat condition... ?
CPS... wet or dry?
Last edited by CaliBenzDriver; Apr 14, 2024 at 06:55 PM.
Thread Starter
Newbie
Joined: Apr 2024
Posts: 9
Likes: 3
From: Germany
W212 E500 M278
According to Xentry, it is fuse 1 and 2 of the ignition coils, but these fuses do not exist.
I have replaced all 8 ignition coils with new ones, but the fault remains.
It is of course also possible that the fault was already there before the engine was overhauled, but I have now driven approx. 500 km without any problems. The vehicle has now covered a total of 280,00km.
The engine only had a timing chain problem before the repair, but I overhauled the entire engine, new pistons, steel liners, new injectors, everything completely new...
The problem always occurs relatively early, usually the engine can be started again after a few minutes and it runs again without any problems, I will have a look at the wiring etc.
I have replaced all 8 ignition coils with new ones, but the fault remains.
It is of course also possible that the fault was already there before the engine was overhauled, but I have now driven approx. 500 km without any problems. The vehicle has now covered a total of 280,00km.
The engine only had a timing chain problem before the repair, but I overhauled the entire engine, new pistons, steel liners, new injectors, everything completely new...
The problem always occurs relatively early, usually the engine can be started again after a few minutes and it runs again without any problems, I will have a look at the wiring etc.
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
A needle in hay stack...
I see... all new coils, good fuses and two codes pointing at coils after engine quits.
Not the most obvious!!
It seems the ECU is crashing with somewhat predictable regularity. Restart and then ok thereafter.
-- Can you scan the whole chassis for other crazy modules impacting ECU work.
-- Can you look at live data instead of driving when engine wants to quit.
- A bad CKP can stop engine but we need evidence of what's not happening.
- look at both your fuel pressures under load.
- You had the engine out for complete overhaul... you definitely reconnected the Main GND Strap at bell housing junction with tranny, yes ?
-- Are all 4x camshaft sensors reporting well when engine quits.
-- you replaced all your injectors and configured then with Xentry guided procedure, right?
🤞
Not the most obvious!!
It seems the ECU is crashing with somewhat predictable regularity. Restart and then ok thereafter.
-- Can you scan the whole chassis for other crazy modules impacting ECU work.
-- Can you look at live data instead of driving when engine wants to quit.
- A bad CKP can stop engine but we need evidence of what's not happening.
- look at both your fuel pressures under load.
- You had the engine out for complete overhaul... you definitely reconnected the Main GND Strap at bell housing junction with tranny, yes ?
-- Are all 4x camshaft sensors reporting well when engine quits.
-- you replaced all your injectors and configured then with Xentry guided procedure, right?
🤞
Thread Starter
Newbie
Joined: Apr 2024
Posts: 9
Likes: 3
From: Germany
W212 E500 M278
Here is the solution:
It happened to me twice that I forgot to screw on the ground wire... I have now driven almost 4000km without any problems and am very satisfied.
Many thanks for your help!
It happened to me twice that I forgot to screw on the ground wire... I have now driven almost 4000km without any problems and am very satisfied.
Many thanks for your help!
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
Likes: 6,769
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
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Newbie
Joined: Apr 2026
Posts: 1
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Two solutions
According to Xentry, it is fuse 1 and 2 of the ignition coils, but these fuses do not exist.
I have replaced all 8 ignition coils with new ones, but the fault remains.
It is of course also possible that the fault was already there before the engine was overhauled, but I have now driven approx. 500 km without any problems. The vehicle has now covered a total of 280,00km.
The engine only had a timing chain problem before the repair, but I overhauled the entire engine, new pistons, steel liners, new injectors, everything completely new...
The problem always occurs relatively early, usually the engine can be started again after a few minutes and it runs again without any problems, I will have a look at the wiring etc.
I have replaced all 8 ignition coils with new ones, but the fault remains.
It is of course also possible that the fault was already there before the engine was overhauled, but I have now driven approx. 500 km without any problems. The vehicle has now covered a total of 280,00km.
The engine only had a timing chain problem before the repair, but I overhauled the entire engine, new pistons, steel liners, new injectors, everything completely new...
The problem always occurs relatively early, usually the engine can be started again after a few minutes and it runs again without any problems, I will have a look at the wiring etc.
then check for broken connector sleeves.
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