Good Q&A for Fault Code P1341

[MNBoxster]

Hi,

Good Post, but of course it's only relevant to the '97-'02 Models. These Cars have the 1st Gen VarioCam which uses a simple Solenoid Mechanism controlled by the DME. In it, the Valve Timing is in either the Standard or Advanced Mode, a simple ON/OFF.

The 2nd Gen VarioCam used in Models since '03 uses an Oil-Filled Stator with internal Vanes. The Hydraulic pressure created by the turning Vanes causes the Cams (and the Valve Timing) to shift infinitely through it's 40° Range. It does not use Solenoids, or the DME, to activate it. Hope this helps...

Happy Motoring!... Jim'99

[racer_d]

mmm Why I Love Search....

My Boxster was just diagnosed with P1341 (and P1128 - lean mixture)

A 2000, non-S motor.

I have visions of complete motor replacement/rebuild, but hopefully its as "simple" as a bad solenoid?

Does anyone have an engine schematic to show the areas affected and what other "damage" may cause this fault code to show? Can the chain driven camshaft have actually skipped a tooth, thus throwing off timing? How about a tensioner?

Thanks again!

[FrayAdjacent]

Originally Posted by racer_d

Does anyone have an engine schematic to show the areas affected and what other "damage" may cause this fault code to show? Can the chain driven camshaft have actually skipped a tooth, thus throwing off timing? How about a tensioner?

Thanks again!

I doubt the timing chain could skip a tooth, but if it did... it could grenade the engine (valves not closing in time) or otherwise the engine would probably run very poorly... half of the cylinders would not be getting the right amount of air.

I'm not sure if the tensioners have some sort of sensor to tell if they're failed, but IIRC, (with a little experience with older 911s) a failed tensioner would lead to a lot of noise from the chain.

I'm willing to bet the only repercussion of this fault would be that one bank would be running with the default cam profile, since the solenoid can't move it to the secondary cam profile at higher RPM. I could GUESS that it MIGHT cause a little vibration, since the other bank would be getting more air, and would be producing a little more power per stroke....


But then, I'm not really an expert...

[986man2015]

Originally Posted by MNBoxster

Hi,

Good Post, but of course it's only relevant to the '97-'02 Models. These Cars have the 1st Gen VarioCam which uses a simple Solenoid Mechanism controlled by the DME. In it, the Valve Timing is in either the Standard or Advanced Mode, a simple ON/OFF.

The 2nd Gen VarioCam used in Models since '03 uses an Oil-Filled Stator with internal Vanes. The Hydraulic pressure created by the turning Vanes causes the Cams (and the Valve Timing) to shift infinitely through it's 40° Range. It does not use Solenoids, or the DME, to activate it. Hope this helps...

Happy Motoring!... Jim'99