Menu toggle

CAN fault codes

minny

minny

PCGB Member
Member
My 2004 996 turbo throws up a couple of recurring fault codes every so often and would appreciate any advice how to proceed with diagnosis to establishing the fault.

The first is a DME fault code P1601 (CAN timeout instrument cluster) and the second is a Tiptronic fault code 40 (on PIWIS2, CAN instrument cluster communication disturbed). Everything is functioning normally with no lights on, all buttons working and the car drives well. After I clear the faults, it can recur within the day or not for a couple of weeks. Apart from needing to make sure the connector to the instrument cluster is secure, the prospect of back probing wires to the respective computers is daunting. However if anyone has embarked on a journey to establish a similar fault, your guidance to carrying it out will be most helpful.

 
Not of direct help, but I look at a lot of fault codes and the can bus seems to produce a lot of ‘soft errors’. I attribute this to perhaps a corrupted command or loss of power (flat battery).



 
I would have considered the battery myself except my Yuasa Silver battery is only 6 months old and I keep in trickle charged using a CTEK MXS 7.0 every weekend. I tested it with a conductance tester and battery is atill producing 110% of the rated 850A EN capacity. Alternator is working fine with 13.5V while the engine is running.
 
I don't think you have much choice other than to check the wiring in accordance with the diagnostic sheets. I would start with the Tip error 40 sheet, as there is less to it. If the wiring checks out, then the cluster is faulty, but if it isn't causing any problems then it would be best to live with the fault codes.

I'll email you the diagnostic sheets in case you don't have them.
 
Thank you Richard. Car is running perfectly so I’ll have a look at the sheets and see what is involved and do what i can that doesn’t involve too much dismantling.
 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top