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JOE AUDI
JOE AUDI, MASTER TECHNICIAN
Category: Audi
Satisfied Customers: 551
Experience:  25 PLUS YEARS AS TECHNICIAN, AUDI MASTER TECHNICIAN
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2003 AUDI A6 WITH A 3.0 ENGINE. CHECK ENGINE LIGHT ON CODE PO 390.

Customer Question

I HAVE 2003 AUDI A6 WITH A 3.0 ENGINE. CHECK ENGINE LIGHT ON CODE PO 390. THE CAMSHAFT SENSORS ON BANK 2 HAVE BEEN REPLACE. AFTER RESETTING THE CHECK ENGINE LIGHT THE CHECK ENGINE WILL COME BACK ON WITH IN THREE IGNITION CYCLES.CHECK WIRING,FUSES,CONNECTIONS. HAS ANYBODY HAD THIS PROBLEM ON THIS KIND OF CAR.
Submitted: 7 years ago.
Category: Audi
Expert:  JOE AUDI replied 7 years ago.
Hi my name isXXXXX is a bulletin that applies to your car that involves an internal oil leak at the camshaft adjusters. But it is usually associated with other DTC's.

Technical Service Bulletin Transaction No.:(NNN) NNN-NNNN6
15 Oil leak and/or camshaft DTCs stored - 3.0L Release date: Nov 7, 2008

• Oil leak at cylinder head around the camshaft adjuster(s).

• Oil leak around toothed belt drive coming from camshaft adjuster(s).

• One or more of the following DTCs may be present:

? DTC P1519 (17927 Intake Camshaft Control, Bank 1 - Malfunction).

? DTC P1522 (17930 Intake Camshaft Control, Bank 2 - Malfunction).

? DTC P0015 (16399 B Camshaft Position, Bank 1 - Timing over-retarded).

? DTC P0025 (16409 B Camshaft Position, Bank 1 - Timing over-retarded).



• and/or:

? DTC P1996 (18404 Friction too high, code E1; Intake - Bank 1).

? DTC P1997 (18405 Friction too high, code A1; Exhaust - Bank 1).

? DTC P1998 (18406 Friction too high, code E2; Intake - Bank 2).

? DTC P1999 (18407 Friction too high, code A2; Exhaust - Bank 2).



Technical Background

Gaskets and/or sealing rings of camshaft adjusters and/or timing case might be leaking.

The internal bolts of camshaft adjuster(s) might have a reduced torque.

An oil leak also might cause one or more of the mentioned DTCs due to a reduced operating oil pressure in the camshaft adjusters.


Did you have the timing belt done recently?
Is there any oil leaks visible?
Are there any other DTC's?
The main reason is that an oil pressure problem can cause that sensor to set the MIL (check engine light). The internal leaks are usually somewhere in the cam adjustment circuit and that momentarily disruptes the cam timing tripping the fault.
If that is the problem, then you will need it to be inspected to find the cause of the internal leak. It could be simple, like the sealing rings for the adjuster where damaged when the timing belt was done or it could be involved like the tensioner housing is contaminated.
Thank you for choosing Just Answer,
Joe.