goto engine electrics and enter into basic settings channel 94 now raise the engine speed to 2000rpm and hold it there,look at zone three and it should go from test on to test off and then sytem ok(this may not be supported on your engine code so you may have to give me your engine number and year)If it comes up ok erase the fault memory and test.Here is some more info on your code
16396/P0012/000018 - Bank 1: Camshaft A (Intake): Advance Setpoint not Reached (Over-Retarded)
Possible Symptoms Possible Causes - Intake Camshaft Adjuster tight/stuck
- Intake Camshaft Adjuster faulty
Possible Solutions - Check Intake Camshaft Adjuster
- Use Output Test, Meas. Value Blocks (MV & Basic SettingBecause the chain tensioner is oil feed,draining the oil and lossing the pressure can cause this so hopefully a reset should resolve it or try carring out output test via vagcom and this should alter the tensioner from lowest position to higest.
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