2004 Cayenne-S PSM failures Workshop

[paulwu]

Hello Guys,

 

Needing your help for the flying pig; problem one coming another, never finished!

 

2004 Cayenne-S 210K kms. Today suddenly the PSM failures Workshop yellow warning light on while on the road. It were on and off during past years guess mostly because of low voltage.

 

This time with a new and strong battery just changed 2 month ago; alternator with 14V charing; the PSM failures Workshop light stays steady unlike before would got disappeared after off and restart. After some google there is one mentioning about the steering angle sensor; needing you guys opinions.   

 

After hooked up the diagnostic tool I could not disable the PSM light and got new errors:

 

Under DME: P0102 mass air flow circuit.

Under transmission: 1314 DME control module

 

Getting more challenges; my pig is the lucky one that wining all the rewards! 

 

Thanks,

 

Paul

[lewisweller]

2 hours ago, paulwu said:

Hello Guys,

 

Needing your help for the flying pig; problem one coming another, never finished!

 

2004 Cayenne-S 210K kms. Today suddenly the PSM failures Workshop yellow warning light on while on the road. It were on and off during past years guess mostly because of low voltage.

 

This time with a new and strong battery just changed 2 month ago; alternator with 14V charing; the PSM failures Workshop light stays steady unlike before would got disappeared after off and restart. After some google there is one mentioning about the steering angle sensor; needing you guys opinions.   

 

After hooked up the diagnostic tool I could not disable the PSM light and got new errors:

 

Under DME: P0102 mass air flow circuit.

Under transmission: 1314 DME control module

 

Getting more challenges; my pig is the lucky one that wining all the rewards! 

 

Thanks,

 

Paul

I've had both them codes and not to sound like a broken record it was my new battery! I've gone through 3 since March. All replaced under warranty as defective. Your charging voltage is 14v which is perfect but what's the battery voltage with engine off and also in the morning after leaving the car standing over night. 12.6v is essential less than is a problem. 

 

[paulwu]

Thanks for the info. I am letting my battery charge overnight and see if were the low voltage issue again!

[paulwu]

Yes it is the low voltage issue that caused the PSM failure. Thanksfor the info and helping to confirm the issue; very helpful!

[lewisweller]

53 minutes ago, paulwu said:

Yes it is the low voltage issue that caused the PSM failure. Thanksfor the info and helping to confirm the issue; very helpful!

Your welcome. The winter is playing it's role in bringing suspect batteries to the attention of owners by way of random codes. 

Would be great if Porsche could just have one code that says"Your battery is s**t please replace it". Lol

[paulwu]

LOL..indeed! I am in Montreal, Quebec it is now -13C **** winter. Could not believe I just paid $300 for a brand new AGM battery!

 

After full charged the battery it is fine now whole day of driving..should I claim for warranty the battery?

[lewisweller]

6 hours ago, paulwu said:

LOL..indeed! I am in Montreal, Quebec it is now -13C **** winter. Could not believe I just paid $300 for a brand new AGM battery!

 

After full charged the battery it is fine now whole day of driving..should I claim for warranty the battery?

Yer why not claim. If it's under warranty. If the battery is defective it will continue to drain.