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Old 28-06-15, 02:37 PM   #1
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Default intermittent fault variable valve lift position sensor track 2 signal coherance

can any one help with this fault

intermittent fault variable valve lift position sensor track 2 signal coherance

thanks
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Old 28-06-15, 06:12 PM   #2
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That actually means that the ECU is not getting a proper signal from a camshaft position sensor on one of the camshafts (whichever is classed as track 2), the cause is either a faulty sensor or wiring/connectors. Check all connections or failing that a diagnostic on PP/Diagbox should be able to narrow it down.
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Old 28-06-15, 06:53 PM   #3
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thanks new part ordered
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Old 28-06-15, 07:14 PM   #4
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That's fine if you're confident it is not the wiring.
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Old 28-06-15, 07:48 PM   #5
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buzzed the cables out and they seem ok

fingers crossed this does it could do with the browny points

thanks again
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Old 28-06-15, 08:35 PM   #6
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Well fingers crossed I would feel happier if it was put on diagnostics to rule out anything else as sometimes these codes don't always literally mean what they say and VVT does sometimes have hydraulic issues that could possibly flag up the same code it depends on how the ECU has been programmed at the factory. Cam sensors do give a lot more problems than the VVT system and I would have thought there would be other codes if the VVT itself was at fault but always err on the side of caution.
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Old 28-06-15, 10:04 PM   #7
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What oil is in the car, wrong grade oil, VVT solenoids/motor and loose chain/tensioner issues can all trigger that error code
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Old 28-06-15, 10:31 PM   #8
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Quote:
Originally Posted by windy1603 View Post
What oil is in the car, wrong grade oil, VVT solenoids/motor and loose chain/tensioner issues can all trigger that error code
Hi Windy are these cars not programmed to log phase error codes as would usually show a phaser problem?
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Old 29-06-15, 01:03 PM   #9
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what engine is it?
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Old 29-06-15, 02:54 PM   #10
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i was thinking more essentric shaft sensor, on the bmw engine they tend to let oil through, take the top of it and check and clean.

on the vti its at the rear right of engine when stood at the front of the car, google.... Valvetronic Eccentric Shaft Sensor.

i would also unwind the valvatronic motor out with a allen key in the rear of it, check its not gunked up.
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