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Discussion Starter #1 (Edited)
Dear all, I have some problems with my ‘98 M5 E39. I have not driven for some weeks, after this when I drove again everything was fine. But after some weeks the engine started to have a problem. It sounds like not all of the cylinders worked. But there has been no information in the car computer and engine power was normal (no emergency mode of engine or engine light). I have checked the error codes via INPA and these are the results:
After starting the cold engine:
Error 74 Inlet VANOS, bank 2, advance valve
Comment: 0100 Broken cable or value is missing
After a short time this error occurs:
Error 113 Function, inlet VANOS, bank 2
Comment: Actual value too small
Then:
Error 75 Inlet VANOS, bank 2, retard valve
Comment: 0100 Broken cable or value is missing
A little bit later:
Misfire cylinder 5,6,7,8 (Errors: 200-213) with cylinder cutout
I have searched for possible reasons of these problems and have found two possible reasons: The sensors for the Vanos or the VANOS valves are not OK.
But I’m not sure, if the comments from the OBDII “Broken cable or missing value” point to a complete different reason.
It would appreciate any ideas or comments which I should do first to fix my car.

Thanks in advance,
Lars



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You may want to scan using a bmw equipment or something equal to bmw software to read specific codes. You may want to refresh the vanos solenoids with new o rings.
 

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You have INPA, do you also have or have access to DIS? If so run the VANOS test in DIS and report the findings (screen shots or photos are a good thing).

How old are the Camshaft Position Sensors (CPS)? If you do not know or if they are quite old it may be worth while replacing them. If you replace the CPSs and the problem persists; it will be time to look at the VANOS solenoids. Pull the solenoids and check the solder joints (reflowing the solder is advisable as this is a known issue) clean the solenoids and replace the O-rings. Hopefully, this will get your issue sorted.

good luck.
 

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Bank 2 left side you have at least one failed solder joint, that is the first code. The second code comes because there is no oil flowing thru the inlet to allow the retard valve to work correctly. You might also find the fault is in the ground wire which is shared by both of those solenoids. Tons of good threads on rebuilding the boards you should have no problems.
 

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I agree with Sailor. Looks like you have a bad solder joint. Start by repairing them, might as well clean the insides of the solenoids while you're in there. Clear the codes and drive. Then if there are any codes remaining, look at those.
 

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Discussion Starter #6

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Yes that is a good DIY but read the whole thing somethings were clarified later in the thread. Not sure the vanos is your only problem but you need to fix it first.
 

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Yes, the 74 and 75 codes are saying there is an electrical problem with both the solenoids that control the bank 2 intake cam. Likely soldered joints on the circuit board as said. Due to your model year (I didn't even know M5's were built in 1998, Germany only?), you don't have the later aluminum covers with the 4 screws that clamped the solenoids down. The constant rapid chattering movement of the solenoids is very hard on the soldered joints and solenoid o-rings. Some have upgraded to the later covers with the clamping screws like this one. You should do both boards as they are probably both bad.

The 113 code and the misfire codes on bank 2 came in because of the problems with the solenoids.

IMAG0386.jpg
 
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