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Porsche 986 OBD


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Last Post: Dec 6, 2013 3:51 PM Last Post By: Francis at Bent...
SwissMiss

Posts: 1
Registered: 12/04/13
OBD
Posted: Dec 4, 2013 7:24 AM
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I am starting from zero knowledge !
Our OBD on our Boxster S has thrown up the following :

P1340 322 Position of camshaft in relation to crankshaft cyl. 1-3 Short to ground/below lower limit/lean mixture threshold
P1340 322 Position of camshaft in relation to crankshaft cyl. 1-3 Short to B+/above upper limit/rich mixture threshold
P1341 174 Camshaft adjustment cyl. 1-3 Signal implausible/implausible operating range/malfunction
P1341 174 Camshaft adjustment cyl. 1-3 Short to ground/below lower limit/lean mixure threshold
P1341 174 Camshaft adjustment cyl. 1-3 Short to B+/above upper limit/rich mixture threshold

Would anyone like to help me understand please!
Firstly, can we drive the car without harming anything ?
Thank you !
Francis at Bent...

Posts: 21
Registered: 11/13/13
Re: OBD
Posted: Dec 6, 2013 3:21 PM   in response to: SwissMiss in response to: SwissMiss
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Moved to Boxster forum
Francis at Bent...

Posts: 21
Registered: 11/13/13
Re: OBD
Posted: Dec 6, 2013 3:51 PM   in response to: SwissMiss in response to: SwissMiss
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Thanks for posting in the Bentley Forums. Your faults relate to the crankshaft to camshaft correlation. Your car has a mechanical adjuster controlled by a solenoid. The solenoid is controlled by the cars DME (engine computer). The adjuster changes the camshaft timing. the faults show that the car is seeing the camshaft in a different position than it expects it to be versus the crankshaft position for where it has requested. Possible fault causes could be the camshaft adjuster itself. The solenoid valve that controls the adjuster. The bank one timing chain itself (not likely). The wiring between the DME and camshaft adjustment solenoid. That is the solenoid in the camshaft cover. The wiring should always be checked first. The DME is in the rear luggage compartment under the carpet in the front of the compartment. Bank one solenoid will be passenger side of the vehicle. Basic electrical checks should be with the DME unplugged and include continuity, short to ground, short to B+ and resistance. Always check the condition of the connectors as well. I hope this will allow you to get a grasp of what could be wrong. Please let me know if you have further questions as you begin diagnosis.

Francis

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