Camshaft timing CEL Reoccuring Problem

[crit1]

I have a '95 C280 (M104 engine) and have a reoccuring CEL. The code is 'Adjustable camshaft timing solenoid without function (logic chain)' (P1341). My mechanic has replaced the camshaft adjuster magnet and the camshaft position sensor but the light continues to come on (the last time after 20 miles). What else could it be? What else will activate this CEL circuit?

[stox]

P1341

Activation requirement CHECK ENGINE lamp:
--After one "performed test" test with fault.

Activation of CHECK ENGINE lamp:
--At start of next trip

Test to detect fault:
--The logic chain of camshaft timing adjuster is checked if the following conditions are met simultaneously:
� No failure of electrical activation of camshaft timing adjuster solenoid
� Decleration fuel shut-off active
� Idle speed contact closed
� Engine speed between approximately 1600-2500 RPM and constant
� Intake manifold vacuum less than approximately 250mbar
� Altitude below approximately 2000 meters
� Momentary intake air temperature >10�C. --The diagnostic module determines the momentary intake manifold vacuum after approximately 1 second. Initiated by the diagnostic module (via the CAN data bus), the engine control module then acutates the camshaft timing adjuster solenoid for approximately 2 seconds. At the same time, the intake manifold vacuum is further evaluated for approximately 6 seconds.
--A fault is recognized if the intake manifold vacuum does not change by at least approximately 15mbar, when the camshaft is adjusted from "advanced" to "retard" or vice versa (camshaft timing adjuster solenoid activated Camshaft position "advanced" = intake manifold vacuum higher).

ODBII Codes (http://202tech.mkosonen.com/howto/enginecodes.html#P1341)

[martattack]

Has your engine wiring harness been replaced? 1995 C280s were affected by the infamous degrading wiring harness. Have you been having any misfire codes or anything else?

[benzaddict]

Yup, I'd be very suspect of your engine harness, especially at the cam adjuster. The harness plug at the cam adjuster has a very sharp bend and is usually one of the first to have damage with a harness that's degrading.

[SLAMMED_C]

when was the last time you changed your engine oil?...

[crit1]

Thanks for all your input. I've replaced the engine wire harness and just put in a rebuilt throttle actuator. Plus, I just changed the oil 4 days ago.