Valvtronic Code 135C11 for the motor?

So this is telling you the high pressure fuel pump cannot keep up or the fuel pressure sensor is going out.

Code 135C11 - DME: Fuel pressure too low during cold start

I would try the sensor first because they have a high failure rate, and if that doesn't help you will need a high pressure fuel pump, also check the cam lobe once the pump has been removed, there is a chance the camshaft lobe is worn out FYI. Here is how to change the sensor and HPFP. When you change the parts out be sure to loose the fuel line to release the fuel pressure slowly. Check out the images (below). Please upload pictures or videos in your response

I attached a photo of the code. So, even though it says “valvetronic servomotor position sensors signals implausible” it really means “Fuel pressure too low during cold start” ???

That is a general code that is telling you one of the sensor is giving back information that is not viable. which will be the oil pump control solenoid as per the other codes.

Ahhh, gotcha. Thank you for clarifying. I dropped the oil pan and found a few broken pieces of plastic from the timing chain guides in there. The oil pump pick-up looked clean and not clogged. I’m assuming that maybe there were some plastic pieces close to the pick up and perhaps it was restricting oil flow?

Because I wouldn’t think that the oil pump is bad, right?

No the oil pump is probably good, it is the oil pump control solenoid that needs to be replaced.

How can I test for that to see if it’s good or not? I have an autel mp808 scan tool

Bench test by applying 12 V power to the valve terminals:

It should click or move slightly when energized. When power is removed, it should return to resting position. If it doesn’t move or sticks, it’s defective and needs replacement.

Do you have any detailed instructions for that? Both removing the solenoid and testing it

It seems like you have two problems, with this car, did you ever remove the high pressure fuel pump to check the camshaft lobe?

I have not

lets try that, we need to get to the bottom of:

Code 135C11 - DME: Fuel pressure too low during cold start

Lets keep the oil pump problem on this thread.

https://www.2carpros.com/questions/low-oil-pressure-74812562


Please upload pictures or videos in your response

Hey Ken, could you please send detailed instructions on removing the high pressure fuel pump to check the camshaft lobe?

Thank you very much for helping me

That is all they give us, I would crack a fuel line to relieve the pressure on both high and low side. Also you can upload images so I can see the vital parts and I can tell you if they need replacement. I would replace the HPFP because they have a high rate of failure.

I ended up selling the car so I never got down to the bottom of it, but Thank you for the help and great information! You guys rock!

Thank you, yep that is one way to fix the problem :) Let us know how it goes or if you need anymore help with other cars. Ken