MY08 X5 3.0si Inpaload Error Reading

[koolkat1973]

Hi -

I'm hoping someone on this board can help me troubleshoot an issue with MY08 3.0si. Last week, the CEL came on and my car would stutter a little beat. I could tell something was not right because when I press the gas pedal to accelerate, the car would not accelerate. It sputter for a bit but was still moving. Then by the time I pulled into my garage, the CEL went away and car is running fine again.

I pulled the codes from OBD and got the following error code: 2A82, 2A99, 29CF. Based on my research, these codes are related to the Vanos Solenoid. I'm thinking of replacing both Vanos Solenoid but I wanted to see if the error code comes back after clearing it. So far - it's been 3 days and the error code has not return.

I also did some monitoring of my car using INPALOAD to get the current status while driving. There are some abnormal readings but I'm not sure what they are. Hoping someone here knows how to interpret it.







Thank you in advance.

Kiet

[jfoj]

No disrespect to your using INPA, however, if the SES/CEL/MIL comes on, you are best to use a generic OBDII tool as it WILL display the OBDII codes that triggered the SES/CEL/MIL in Pxxxx format in plain English.

Suggest you consider the OBDFusion App with the proper interface, under $30 for both.

You will also be able to easily Log with the App as well.

[koolkat1973]

Originally Posted by jfoj

No disrespect to your using INPA, however, if the SES/CEL/MIL comes on, you are best to use a generic OBDII tool as it WILL display the OBDII codes that triggered the SES/CEL/MIL in Pxxxx format in plain English.

Suggest you consider the OBDFusion App with the proper interface, under $30 for both.

You will also be able to easily Log with the App as well.

Thanks for the OBDFusion App recommendation. I will take a look at it. I have other cars as well so this may come in very handy.

[the_ulf]

Spannung Motortemperatur = engine temp voltage (probably V output of temp sens)
Spannung Kuehlmitteltemperatur Kuehlerausgang = coolant temp voltage at radiator exit (same as above, prob V readout from the temp sens)
Spannung SG-Innentemperatur = inside temp control unit voltage (i don't even really know what that means but as far as i could decypher SG stands for Steuergeraet, which translates as control unit)
Spannung Sekundaerluft = secondary air voltage
Motortemperatur = engine temp

from an engineering background i'd say that the integer values for those sensors is outside the pre-defined min/max bracket. everything really points to an electrical issue rather than engine problems. like the supply voltage for the sensor bus is too high, throwing readouts above the max value.

i could be wrong tho...

edit: looking at the actual values in your screen shots: yes, 105.48V is most definitely outside the range, lol. and since those values vary wildly from 0V to over 100V i'd say it's probably a shot control unit.

[koolkat1973]

Originally Posted by the_ulf

Spannung Motortemperatur = engine temp voltage (probably V output of temp sens)
Spannung Kuehlmitteltemperatur Kuehlerausgang = coolant temp voltage at radiator exit (same as above, prob V readout from the temp sens)
Spannung SG-Innentemperatur = inside temp control unit voltage (i don't even really know what that means but as far as i could decypher SG stands for Steuergeraet, which translates as control unit)
Spannung Sekundaerluft = secondary air voltage
Motortemperatur = engine temp

from an engineering background i'd say that the integer values for those sensors is outside the pre-defined min/max bracket. everything really points to an electrical issue rather than engine problems. like the supply voltage for the sensor bus is too high, throwing readouts above the max value.

i could be wrong tho...

edit: looking at the actual values in your screen shots: yes, 105.48V is most definitely outside the range, lol. and since those values vary wildly from 0V to over 100V i'd say it's probably a shot control unit.

Thank you very much for your input. My X5 appears to be driving fine at the moment even with these high abnormal readings. Looks like more than 1 sensor is giving bad voltage reading. Any idea what control unit I should be looking at. Thanks.

[jfoj]

I would be using another tool to look at some of the values before I would be jumping on things.

But this being said, I would also check grounds, even the engine to body ground.

If there is something in error with the engine temperature, even the radiator outlet temperature, another tool that would read these values as Live/Realtime data other than INPA would be something wise to check these with. You could even use the Hidden OBC Menu to verify engine temperature.

Often too much stock is put into things like INPA, which leave a lot to be desired due to language, semantics and other things.

Something like the SAP error may in fact be normal as the SAP only runs for the first 90 seconds or so on cold start. So without being able to compare another car, it is hard to say is the SAP error a "real" error.

[koolkat1973]

I'm wondering if this is a sympton of a coolant temperature sensor gone bad.

[jfoj]

Originally Posted by koolkat1973

I'm wondering if this is a sympton of a coolant temperature sensor gone bad.

Doubt it as there are at least 2 different temperature values that "appear" to be in some "fault" state. But a tool that will read the temperature PID's from the DME will give you a very good idea if in fact there is a temperature out of range due to either a sensors or something like a water pump problem.

I assume this is the 6 cylinder with the electric water pump that are known to fail early??

[koolkat1973]

Originally Posted by jfoj

Doubt it as there are at least 2 different temperature values that "appear" to be in some "fault" state. But a tool that will read the temperature PID's from the DME will give you a very good idea if in fact there is a temperature out of range due to either a sensors or something like a water pump problem.

I assume this is the 6 cylinder with the electric water pump that are known to fail early??

Yes - this is 6 cylinder X5 and I've already replaced the water pump less than 2 years ago.

[jfoj]

Hidden OBC menu is where I would head next unless you have other tools/software that can read these temps.

http://www.scoopz.com/m5board/E60_Hi...structions.pdf

Not sure what the 6 cylinder nominal temp should be, assume around 96C. I have a 4.8l and the nominal temp is supposed to be around 122C which is WAY too hot, I am running a 90C stat in the engine so it does not melt down.

Do not fall into the trap that just because the water pump was replaced 2 years ago it is still fine!! These pumps do not have a great track record.

You have to rule out all the obvious problems.

Also I recall that this engine/body may be one of the ones that has water leaks from the cowl that can corrode the injector wiring for a single cylinder.

Engine to body grounds on these can also be a problem.