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      12-18-2015, 04:17 AM   #1
ALLSHW
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Advice on Valvetronic system fault

Hi Guys,

got an engine light this morning. car went into limp mode (reduced power output).

gave the car a scan with my Autel, came back with the following faults.

i cleared the DTCs and did a re-learn of the VANOS motor. took it to redline a few times seems okay.......for now

is this a common issue? anyone had this before?

car has done over 180,000km, maybe time for a trade in?

cheers
Mike
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      12-20-2015, 07:46 AM   #2
T1M
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Might just need new vanos solenoids? Not expensive/difficult to do
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      12-20-2015, 08:28 PM   #3
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That's not your standard VANOS solenoid fault code but I looked at the fault code list and I can't seem to find yours so maybe it's a similar thing.

2A80 inlet-Vanos variable cam control test, input signal
2A82 inlet-Vanos variable cam control test
2A85 outlet-VANOS variable cam control test
2A87 outlet-Vanos variable cam control test, mechanics

I had some of the above codes. I took out my VANOS solenoids, blasted them with compressed air from one of those compressed air cans and reinstalled and haven't had an issue since. Not saying that that's your issue, but that's my experience with VANOS issues to date.
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      12-23-2015, 11:29 PM   #4
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Its not a VANOS fault, its a valvetronic fault. The N54 doesnt have valvetronic so not too much is commonly known about it but by looks of the speedo going to 240kmh I would say we are talking about 120i.

The valvetronic system is essentially the throttle body for those engines and adjusts the valve lift to suit required airflow.

My $0.02 is that being so high mileage I would say that its likely a sign that the valvetronics motor is on its way out.
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      12-24-2015, 01:57 AM   #5
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As strange as this might sound... Are you using the correct motor oil? (type, and viscosity) I've seen where the wrong type can cause an ECL on some Porsche valvetronic systems. An oil change could not hurt.

I would also look at the sensors for the valvetronic. Perhaps one is starting to go out.
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