Rough startup RPM up and down anyone know these 3 codes?

[Kensley]

CDA463
CDA483
CDA497

These rough startups have been giving me a headache
Anyone ever get these codes?

Thanks

Kenny

[rickyf10]

Message (coupling 1 DME2 drive, 34.0.2) missing, receiver DME, transmitter DME2
Message (coupling 4 slave, powertrain, 45.0.2): missing, receiver DME, transmitter DME2
Message (coupling 5 slave, powertrain, 32.0.2): missing, receiver DME, transmitter DME2
You can lookup these codes in detail on bmwfault.codes yourself

[Kensley]

Originally Posted by rickyf10

Message (coupling 1 DME2 drive, 34.0.2) missing, receiver DME, transmitter DME2
Message (coupling 4 slave, powertrain, 45.0.2): missing, receiver DME, transmitter DME2
Message (coupling 5 slave, powertrain, 32.0.2): missing, receiver DME, transmitter DME2
You can lookup these codes in detail on bmwfault.codes yourself

thanks boss

anyone ever get these codes?

[Dwaynos]

Originally Posted by Kensley

thanks boss

anyone ever get these codes?

Have you done anything to the car before this happened? I had all sorts of codes after replacing my plugs. This was due to one of the connectors on one of the DMEs not being fully pushed in, although it seemed to click down ok.

The codes appear to be related to missing messages to the DMEs or something along those lines. I would start with checking all connections.

[Kensley]

Originally Posted by Dwaynos

Have you done anything to the car before this happened? I had all sorts of codes after replacing my plugs. This was due to one of the connectors on one of the DMEs not being fully pushed in, although it seemed to click down ok.

The codes appear to be related to missing messages to the DMEs or something along those lines. I would start with checking all connections.

I actually replaced my spark plugs and o2 not to long ago. I'll check for loose connectors tonight!

thanks

[TLK]

Right the messages are saying one DME is not getting messages from the other DME ( one for each half of the V8), so it's probably just a connector. Similar thing happened to me when I changed spark plugs.

[Kensley]

Originally Posted by TLK

Right the messages are saying one DME is not getting messages from the other DME ( one for each half of the V8), so it's probably just a connector. Similar thing happened to me when I changed spark plugs.

did you have a rough cold start where the RPMs would go up and down and possible stall the car?

[TLK]

In my case I couldn't start the car and I had a lot more messages. It was just a single connector that looked like it was on and latched but it hadn't been down enough before I latched and it was not actually holding on and was a raised up a little bit when I discovered it was loose.

After I put it right the car fired up.

[Mr. M6]

Originally Posted by Kensley

did you have a rough cold start where the RPMs would go up and down and possible stall the car?

i have this problem now, my car rpm going up and and down after the cold start 5 minutes then it will be ok not moving, so only when engine is cold rpm shake up and down, no error codes or faults still.

i will change my plugs and 2 O2 sensor and see what will happen, some one told me maybe i have leak injector... anything more to check ?

[Kensley]

Originally Posted by Mr. M6

i have this problem now, my car rpm going up and and down after the cold start 5 minutes then it will be ok not moving, so only when engine is cold rpm shake up and down, no error codes or faults still.

i will change my plugs and 2 O2 sensor and see what will happen, some one told me maybe i have leak injector... anything more to check ?

I just changed my top two o2 sensors and ordered new spark plugs that are on the way. I also heard it could me the MAF sensors Anyways ill give you an update after i change my spark plugs. I also did an oil change and changed out BMW oil for motul but it didn't seem to do anything.

[TLK]

Could be O2 sensor if the heater has stopped working. They are usually heated so they warm up faster than just the exhaust gas blowing on it. MAF is another good guess and intake air temperature sensor. All these can give you a bad startup.

[glamprecht]

I have the same problem. I did not touch anything in the engine bay, so I suspect something may have vibrated loose, or previous owner. Can you point me to where the connector was that you re-seated? I dont imagine you could share a photo, or just say more or less was it? Was it just above the turbos to the left. I see there are some connectors, or was it lower down on the side of the engine?

Thanks

Originally Posted by TLK

In my case I couldn't start the car and I had a lot more messages. It was just a single connector that looked like it was on and latched but it hadn't been down enough before I latched and it was not actually holding on and was a raised up a little bit when I discovered it was loose.

After I put it right the car fired up.