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7 Series - E38 (1995 - 2001)

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  #1  
Old 07-12-2013, 04:23 PM
moetrucker moetrucker is offline
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Location: USA, NH
 
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Mein Auto: BMW 2001 740il
help

I got an service engine light on. So took my obd ll scanner and p010 camshaft positioning sensor showed up. So I changed the part. Week later same thing. So finally took it to a BMW dealer and was told thermostat is bad. But my obd ll scanner keeps telling me one thing and bmw dealer another. Who do I trust and is this somehow connected???? Anyone experienced this before before??
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  #2  
Old 07-12-2013, 04:43 PM
Mayorchuck Mayorchuck is offline
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Welcome. If you mean P0010, that is not a good code to have. I have no idea how you get a bad thermostat from that code. Did they hook diagnostic equipment to a port under your hood? Did you replace the CPS with a Bosch sensor? As you did not give the year of your car, I can only assume it's a '99-01 model. Keep in mind that codes are stored until you clear them. If you cleared them and it came back, and you replaced the part with a Bosch sensor, then you probably have a deeper issue.

As far as the dealers diagnosis, is the car overheating? Look at the temp sensor on top of the thermostat housing to make sure it is not burnt. Coolant can leak there, burn the wiring and work it's way up the loom into the ebox. This usually causes no start issues. Never seen a thermostat, or sensor issue, associated with that code.

Where are you located in NH?

Last edited by Mayorchuck; 07-12-2013 at 04:45 PM.
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  #3  
Old 07-13-2013, 05:25 AM
moetrucker moetrucker is offline
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Its a 2001il, the car runs and starts fine. Sometimes I get a warning low coolant on my display only during the initial start but I would always think it bc the car is parked up hill. Maybe after all my obd is giving me wrong signals.

I am in hooksett nh
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  #4  
Old 07-13-2013, 07:14 AM
Mayorchuck Mayorchuck is offline
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Know a guy in NH that may be able to help diagnose. Will let you know. The replacement sensor, what it Bosch? Very important. This car does not like, or respond, well to aftermarket sensors.
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  #5  
Old 07-13-2013, 11:17 AM
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QSilver7 QSilver7 is online now
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Mein Auto: 1997 740iL / 2006 X5 4.4
Quote:
Originally Posted by moetrucker View Post
I got an service engine light on... took my obd ll scanner and p010 camshaft positioning sensor showed up. So I changed the part. Week later same thing. ...
First, can you correct the incorrect code you gave us so that we know for sure what code your car registered.

Second, you should really consider adding your model/model year/build date in a permanent signature so that when you ask questions (or others run across your posts in the future) there's a reference point that we can help you better by making specific suggestions/answers based on your car's engine/tranny or any changes that may have occurred during the production run from 1994-2001....as well as it helps us if we need to look up info

Third, depending on what the actual OBD II code is...you have to remember that a code only reveals what sensor registered a code...you must then use deduction and diagnostics to determine what "caused" the sensor to register that code. Just because a "camshaft sensor" code was registered...one must deduce what caused the issue...it could be upstream or downstream of the sensor. The diagnostics and deduction would need to include any other symptoms and/or warning lights that have illuminated.

For now, all we know is that you got an OBD II code (not sure which one because an OBD II DTC code should contain 5 digits "P_ _ _ _ _"...you only gave us 4.


But if the code is P0010...changing the camshaft position sensor on bank 1 isn't necessarily the cure...because that code says that there's an issue with the "circuit" which includes more than just the sensor itself:

P0010 BMW - Variable Camshaft Timing 'A' Circuit Continuity Bank 1


Symptoms
  • - Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
  • - Variable Camshaft Timing Circuit open or shorted
  • - Variable Camshaft Timing Circuit poor electrical connection
  • - Failed Camshaft Actuator
  • - Engine mechanical problems
__________________
Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
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  #6  
Old 07-13-2013, 12:29 PM
Mayorchuck Mayorchuck is offline
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PM sent.

Q, he is only about 45 minutes away from Nick. Nick told me to give him his email so he could set up a time to help.
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  #7  
Old 07-13-2013, 09:28 PM
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QSilver7 QSilver7 is online now
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Mein Auto: 1997 740iL / 2006 X5 4.4
__________________
Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
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  #8  
Old 07-14-2013, 03:25 PM
moetrucker moetrucker is offline
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Sorry new to all this. Code is p0010. But jst was confused, and wanted to understand more, and weather a bad thermostat could cause for a fault like p0010. To show up.

Oh cps brand is bilstein that I changed. There is now rough idle, starts fine. Pulls the same.
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  #9  
Old 07-14-2013, 04:01 PM
Mayorchuck Mayorchuck is offline
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Did you get my private message? There is contact info there for some hands on help.
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  #10  
Old 07-15-2013, 02:44 PM
moetrucker moetrucker is offline
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Yup, I did. l jst have to meet up with him. Thx a lot
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  #11  
Old 07-15-2013, 06:38 PM
Mayorchuck Mayorchuck is offline
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You will be in good hands.
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  #12  
Old 07-21-2013, 12:56 PM
Event Event is offline
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Mein Auto: 2001 740i sport
It happens to me

I kept getting occasional low coolant prompts. It would only take a small, tiny amount of coolant. I didn't think much about it. Well thermostat sensor seal was leaking sending coolant to the DME (ecu) and burned that up and the connector. You don't want that problem. If BMW recommends replacing the theremostat DO IT. When these cars tell you there is a problem there is and that problem can take out several other expensive systems with it.
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  #13  
Old 07-22-2013, 02:55 AM
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PETER NEWMAN PETER NEWMAN is offline
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I just love Mayorchucks first answer with the code breakdown, Thank for posting that info.
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  #14  
Old 07-22-2013, 05:34 AM
Mayorchuck Mayorchuck is offline
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Quote:
Originally Posted by PETER NEWMAN View Post
I just love Mayorchucks first answer with the code breakdown, Thank for posting that info.

That was Q's info and it is excellent at that. Much of what I know about this car I have learned from him over the years.
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