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Old 03-01-2003, 12:41 PM
myarmar myarmar is offline
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Join Date: Jan 2002
Location: NY
Posts: 500
Here is a description of this DTC:
DTC P1_342 Electrical activation of adjustable camshaft timing solenoid (Y49)
Check Engine Lamp: two consecutive trips with fault.
Activation of Check Engine Lamp: at start of next trip.
The Engine control module checks the electric actuation of Y49 and sends a message via CAN. The Diagnostic Module recognizes a fault if problem occur for longer than approx. 2 seconds.

The camshaft adjusting solenoid is initially actuated with a current of 1.5 Amps for about 1 second from HFM control unit. Subsequently the current falls to the holding current of 1 Amp. When the solenoid is energized, the intake camshaft is advanced. The adjustment is dependent of engine coolant temperature (below 15C the camshaft adjustment doesn't operate), and on the engine load and engine RPM map. There are only two positions, advanced and retarded.
Camshaft adjustment (transmission in drive and partial throttle):
Up to approx. 1500 rpm - Retard
From 1500 to 4200 rpm - Advance
Above 4200 rpm - Retard
In transmission range P or N the camshaft advancement occurs at 3000 rpm.
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