N55 electrical problems?

woodworkingnw · 03-19-2021, 08:12 PM

2011 E70 with 150K on it. Serpentine belt broke the other day and I fixed it without any issue. I drove it for about 15 minutes after it was fixed and still no issues. Today my daughter drove it to work and she called me when she was driving home and said it had a warning light on and it was running rough.

When she got home I started it up and it was running smooth except it had an occasional slight hiccup at idol. My first thought was VANOS but after I put the scanner on it and there was a whole mess of codes...

Here's what was listed...

2E0F- VALVETRONIC SYSTEM DEACTIVATED
3849- ALTERNATOR, ELECTRICAL MALFUNCTION
384D- ALTERNATOR, MECHANICAL MALFUNCTION
31E9- ELECTRIC FAN, ACTIVATION, LINE
2D54- VANOS, COLD START NOT CONTROLLABLE
2C58- CHARGING PRESSURE CONTROL
2EFE- COMBUSTION MISFIRE, SEVERAL CYLINDERS
2EE0- COMBUSTION MISFIRE, FUEL INJECTION
2EFF- MISFIRE CYLINDER 1,
2EE4- MISFIRE CYLINDER 1 FUEL INJECTION DEACTIVATED
2F04- MISFIRE CYLINDER 6
2EF4- MISFIRE CYLInDER 6, FUEL INJECTION DEACTIVATED
2D5A- VANOS INTAKE, CONTROL FAULT, CAMSHAFT STUCK

I monitored it as it was running and I didn't see anything that jumped out as a problem. It was reading battery voltage at 14.8V while it was running but I didn't have time to check it with a meter yet.

I plan on checking the battery in the morning to see what it is actually reading. Would a low battery be enough to screw with the Vanos to cause a hiccup at idol when it's running?

ryansbmw · 03-20-2021, 04:39 PM

Interested to hear answers for your last question. I have the 2D5A code as well that occasionally pops up and I’ve read a few places a low battery can cause a VANOS code. I just don’t know how low is low enough

woodworkingnw · 03-21-2021, 04:43 PM

I checked the battery yesterday before I started it and it was right at 12V. Running it's at 14.8v.

I cleared the codes and drove it for an hour and it ran fine but there was still the slight hiccup at idol. I checked for codes again and it is showing the Valvetronic code still. I ordered on and will be replacing it this week.

03-19-2021, 08:12 PM	#1
woodworkingnw Registered 0 Rep 4 Posts Drives: BMW X5 Join Date: Sep 2019 Location: Pittsburgh, PA iTrader: (0)	N55 electrical problems? 2011 E70 with 150K on it. Serpentine belt broke the other day and I fixed it without any issue. I drove it for about 15 minutes after it was fixed and still no issues. Today my daughter drove it to work and she called me when she was driving home and said it had a warning light on and it was running rough. When she got home I started it up and it was running smooth except it had an occasional slight hiccup at idol. My first thought was VANOS but after I put the scanner on it and there was a whole mess of codes... Here's what was listed... 2E0F- VALVETRONIC SYSTEM DEACTIVATED 3849- ALTERNATOR, ELECTRICAL MALFUNCTION 384D- ALTERNATOR, MECHANICAL MALFUNCTION 31E9- ELECTRIC FAN, ACTIVATION, LINE 2D54- VANOS, COLD START NOT CONTROLLABLE 2C58- CHARGING PRESSURE CONTROL 2EFE- COMBUSTION MISFIRE, SEVERAL CYLINDERS 2EE0- COMBUSTION MISFIRE, FUEL INJECTION 2EFF- MISFIRE CYLINDER 1, 2EE4- MISFIRE CYLINDER 1 FUEL INJECTION DEACTIVATED 2F04- MISFIRE CYLINDER 6 2EF4- MISFIRE CYLInDER 6, FUEL INJECTION DEACTIVATED 2D5A- VANOS INTAKE, CONTROL FAULT, CAMSHAFT STUCK I monitored it as it was running and I didn't see anything that jumped out as a problem. It was reading battery voltage at 14.8V while it was running but I didn't have time to check it with a meter yet. I plan on checking the battery in the morning to see what it is actually reading. Would a low battery be enough to screw with the Vanos to cause a hiccup at idol when it's running?
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03-20-2021, 04:39 PM	#2
ryansbmw Lieutenant 181 Rep 550 Posts Drives: 2013 X5 35i M-Sport, 2010 535x Join Date: Jun 2017 Location: NJ iTrader: (1)	Interested to hear answers for your last question. I have the 2D5A code as well that occasionally pops up and I’ve read a few places a low battery can cause a VANOS code. I just don’t know how low is low enough __________________ VRSF CP & DP \| BMS Intake \| MHD 2+ Tune \| BavSound Stage 1 \| 20% Tint Need coding or modules reset? PM me
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03-21-2021, 04:43 PM	#3
woodworkingnw Registered 0 Rep 4 Posts Drives: BMW X5 Join Date: Sep 2019 Location: Pittsburgh, PA iTrader: (0)	I checked the battery yesterday before I started it and it was right at 12V. Running it's at 14.8v. I cleared the codes and drove it for an hour and it ran fine but there was still the slight hiccup at idol. I checked for codes again and it is showing the Valvetronic code still. I ordered on and will be replacing it this week.
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