BMW M5 Forum and M6 Forums banner

1 - 9 of 9 Posts

·
Registered
Joined
·
22 Posts
Discussion Starter #1 (Edited)
Hey guys,

I tried to research this before posting it up the best I could but nobody really seems to have the same issue as me.

Few days ago, I started the car up and drove maybe about 2km, shut the car off and walked away. I came back, hopped in and started it up to get the following errors. Engine Malfunction Reduced Power, DBC malfunction, and DSC Malfunction.

I shut the car off and turned it back on, I got a Increased Emissions warning. I drove home anyways noticing no difference in the power or performance at all. I got home, turned the car off and back on to check and see, and there are no warning lights on and everything is ok.

Today I drove it and exactly the same thing happened again, my Escort system says the car is getting 14.0V, and it peaks at 14.2V. And now, its stuck in limp mode, with DBC and DSC malfunction, Increased emissions, Start assistant inactive. Motor cranks over like day 1..

The dealer says the installation of my RPI scoops have something to do with this (I'm being 100% serious here.....)

I see things about the voltage regulator, alternator, battery and battery sensor being posted up, but I'm not sure what to point the finger at:sad3: Throttle actuators?
 

·
Registered
Joined
·
759 Posts
The 14.0 - 14.2 volts is the output of the charging system, but does not indicate the state of the battery alone. Try and take a reading with the car off. I think you want to see at least 12.0 volts. 12.5 - 12.7 volts is fully charged, I believe. Try putting battery on tender/maintainer when not driving, if your battery is on the low side. I use the Hidden OBC menu (#9 I think) to get the battery reading.
 

·
Registered
Joined
·
162 Posts
The voltage regulator is cheap. If it doesn't fix your problem, then it didn't cost you much.

My car did really strange things when the voltage regulator went out and I have had no problems since replacing it.

Later, Steve
 

·
Registered
Joined
·
22 Posts
Discussion Starter #4
Odd.

The problem has now totally gone away?

Yesterday I only had an emission warning, and today this morning, all lights are off and the car is functioning normally.

Ill swap the voltage regulator out at work anyways and see what happens
 

·
Registered
Joined
·
564 Posts
It might also just be that your battery is getting old and if you are doing a lot of short trips in a day, the battery might not be getting enough time to charge off the alternator. I see you have a MY2006. Are you still running of the original battery?

I have a MY06 also and I replaced my battery early last year - similar issues where my car started burping up all sorts of random issues for a spell, and then they would go away. Replacing the battery has corrected the problem. I think I will replace my VR as well just as a precaution also.

Drop me a PM if you ever come to Richmond. We should grab a coffee sometime.

Ozzy
 

·
Registered
Joined
·
22 Posts
Discussion Starter #6 (Edited)
Hey guys,

So I've run a code scanner on the car and on the engine I do see a worrying throttle actuator code appearing on the scanner. However if I clear the code, and drive away it wont come back? All the lights are off and the car performs perfectly. If I leave the car for more than 7 hours, I can come start it and get no lights on and the car runs fine.

What I'm noticing is the radar detector now keeps getting LOW VOLT and sometimes turns off and back on, and that some times I may just get an increased emissions light, or I get all the lights and limp home on.

Im pretty stumped at this point at what it is, could a voltage regulator throw a throttle bank 2 code just as it is glitching EVERYTHING in the car up?

DSC Malfunction
DBC Malfunction
Start Assistant inactive
Increased Emissions
Engine malfunction / limp home

My BMW indy even thinks its unlikely to be a throttle actuator.

PS Oz I cant PM my number just yet, my post count is too low
 
T

·
Guest
Joined
·
0 Posts
Hey guys,

So I've run a code scanner on the car and on the engine I do see a worrying throttle actuator code appearing on the scanner. However if I clear the code, and drive away it wont come back? All the lights are off and the car performs perfectly. If I leave the car for more than 7 hours, I can come start it and get no lights on and the car runs fine.

What I'm noticing is the radar detector now keeps getting LOW VOLT and sometimes turns off and back on, and that some times I may just get an increased emissions light, or I get all the lights and limp home on.

Im pretty stumped at this point at what it is, could a voltage regulator throw a throttle bank 2 code just as it is glitching EVERYTHING in the car up?

DSC Malfunction
DBC Malfunction
Start Assistant inactive
Increased Emissions
Engine malfunction / limp home

My BMW indy even thinks its unlikely to be a throttle actuator.

PS Oz I cant PM my number just yet, my post count is too low
did you ever get this solved? having a similar issue,.
 

·
Registered
Joined
·
259 Posts
I had the same thing happen to my car this spring. The battery was indeed bad so I replaced it, but the root cause was my throttle actuator on bank one. The dealer replaced it under good will and the car has been fine since.
 

·
Registered
Joined
·
162 Posts
Still sounds like the voltage regulator.
 
1 - 9 of 9 Posts
Top