P0366 Code Problems

 Created by: EMPIR3
Orig. Posting Date User Name Edit Date
Jul 24, 2019 03:41AM kenatminimania  
Jul 23, 2019 05:38AM onetim  
Jul 23, 2019 05:03AM kenatminimania  
Jul 22, 2019 07:24AM EMPIR3 Edited: Jul 22, 2019 12:44PM 
   Forum Width:     Forum Type: 

 Posted: Jul 24, 2019 03:41AM
Total posts: 1562
Last post: Sep 19, 2019
Member since:Dec 29, 2004
Cars in Garage: 1
Photos: 9
WorkBench Posts: 0
Quote:
Originally Posted by onetim
At my work we test our competing OEM VCT systems, A sticking exhaust cam sprocket assembly, or actuator solenoid is the likely cause, low oil pressure can quickly damage the components.
I have also read that the wrong viscosity oil 'can' cause problems with the Valvetronics / Vanos system.

 Posted: Jul 23, 2019 05:38AM
Total posts: 716
Last post: Sep 18, 2019
Member since:Jul 24, 2014
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
At my work we test our competing OEM VCT systems, A sticking exhaust cam sprocket assembly, or actuator solenoid is the likely cause, low oil pressure can quickly damage the components.

 Posted: Jul 23, 2019 05:03AM
Total posts: 1562
Last post: Sep 19, 2019
Member since:Dec 29, 2004
Cars in Garage: 1
Photos: 9
WorkBench Posts: 0
Quote:
Originally Posted by EMPIR3
I have a 2007 Mini Cooper Base model N12. The car lost timing due to low oil pressure about a month ago and after completing multiple repairs we are left with a P0366 code that will return consistently on the second engine start after clearing the codes. The issue we are having is every possible reason we can come up with has been investigated. Hoping someone here has some wizard magic or something.

I apologize if the to-date summary is long, but really want to be comprehensive to answer some of the basic causes right off the bat. 

Summary:
Originally, the car lost timing and died due to low oil pressure and was towed to my shop immediately. Exhaust cam was almost 90 degrees off time. Only code read at the initial scan was a P0302 misfire. 

We replaced the entire timing chain assembly and tensioner. Replacement was done to a tee (since been checked 2 more times out of total bewilderment as well) exact torque specs followed and cam/flywheel locks used during the replacement. 

During reassembly, we noticed the brake vacuum pump drive plate was cracked. we ordered a new one (7570813) and replaced this as well.  

After finishing the reassembly and on the second engine cycle the P0366 code set. We assumed it was a bad sensor. Swapped the intake and exhaust sensors and the code stayed on the exhaust side. Disconnected the sensor entirely and we got a P0365 code instead. Took voltage readings at the harness to compare with the intake and they both read the same. Sensor has 12 volts, 5 volts, and ground as compared to the intake sensor.

Our last guess was that the vacuum pump put too much torque on the cam itself and miss-aligned the end of the cam that is compressed on the assembly where the sensor reads. Took a degree measurement of the sensor reading surface at 90 degrees before TDC and matches up perfectly with the angle given of a new cam.

If it helps start the conversation in the right direction, the only part of the exhaust cam assembly that has not been replaced is the camshaft adjustment unit (7536085)
. We also don't think it is a PCM issue given the circumstances of the code, but i am out of ideas now. 

Thanks to anyone who has some thoughts  
We have not come across these circumstances, but...

P0366 points to the cam position sensor, but have you tried replacing the crank position sensor? (since the cam sensors uses the crank position as reference...) Doesn't explain why the error stays with the exhaust cam, but thought it might be an inexpensive test....

No other thoughts other than the variable cam sprocket...

 Posted: Jul 22, 2019 07:24AM
 Edited:  Jul 22, 2019 12:44PM
Total posts: 1
Last post: Jul 22, 2019
Member since:Jul 22, 2019
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
I have a 2007 Mini Cooper Base model N12. The car lost timing due to low oil pressure about a month ago and after completing multiple repairs we are left with a P0366 code that will return consistently on the second engine start after clearing the codes. The issue we are having is every possible reason we can come up with has been investigated. Hoping someone here has some wizard magic or something.

I apologize if the to-date summary is long, but really want to be comprehensive to answer some of the basic causes right off the bat. 

Summary:
Originally, the car lost timing and died due to low oil pressure and was towed to my shop immediately. Exhaust cam was almost 90 degrees off time. Only code read at the initial scan was a P0302 misfire. 

We replaced the entire timing chain assembly and tensioner. Replacement was done to a tee (since been checked 2 more times out of total bewilderment as well) exact torque specs followed and cam/flywheel locks used during the replacement. 

During reassembly, we noticed the brake vacuum pump drive plate was cracked. we ordered a new one (7570813) and replaced this as well.  

After finishing the reassembly and on the second engine cycle the P0366 code set. We assumed it was a bad sensor. Swapped the intake and exhaust sensors and the code stayed on the exhaust side. Disconnected the sensor entirely and we got a P0365 code instead. Took voltage readings at the harness to compare with the intake and they both read the same. Sensor has 12 volts, 5 volts, and ground as compared to the intake sensor.

Our last guess was that the vacuum pump put too much torque on the cam itself and miss-aligned the end of the cam that is compressed on the assembly where the sensor reads. Took a degree measurement of the sensor reading surface at 90 degrees before TDC and matches up perfectly with the angle given of a new cam.

If it helps start the conversation in the right direction, the only part of the exhaust cam assembly that has not been replaced is the camshaft adjustment unit (7536085)
. We also don't think it is a PCM issue given the circumstances of the code, but i am out of ideas now. 

Thanks to anyone who has some thoughts