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PCM WARNING

RIC480
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RIC480 Member

RIC480

Posted
Posted

HI

I started up my 2004 911 anniv. I got this warning "PCM Not working drive to workshop" also ABS light flashing.Turned off engine and restarted. all fine . Next day started up again all fine. My warrantty is over in 20 days <_<

Thanks

Concerned

demosan Member

demosan

Posted
Posted
HI

I started up my 2004 911 anniv. I got this warning "PCM Not working drive to workshop" also ABS light flashing.Turned off engine and restarted. all fine . Next day started up again all fine. My warrantty is over in 20 days <_<

Thanks

Concerned

How old is your battery?? If your battery is original, this may be the symptoms of the battery getting close to end of usable life. If you don't drive the car daily, do you sue a battey maintainer?? If you have a shop voltmeter, check the battery voltage at the terminals before you drive the car after sitting since lat drive. Should be at least 12.5 volts ( optimum would be 13+). If less, battery may be on last legs

demosan

RIC480 Member

RIC480

Posted
  • Author
Posted
HI

I started up my 2004 911 anniv. I got this warning "PCM Not working drive to workshop" also ABS light flashing.Turned off engine and restarted. all fine . Next day started up again all fine. My warrantty is over in 20 days <_<

Thanks

Concerned

How old is your battery?? If your battery is original, this may be the symptoms of the battery getting close to end of usable life. If you don't drive the car daily, do you sue a battey maintainer?? If you have a shop voltmeter, check the battery voltage at the terminals before you drive the car after sitting since lat drive. Should be at least 12.5 volts ( optimum would be 13+). If less, battery may be on last legs

demosan

Yes its original battery.No I don't drive much I bought the car after one year with 7300 miles now its 4 years old and I have 16.000 miles.Took volt test after car sat for 5 hrs 12.2 . Will do test in the morning before starting

Thanks

Concerned :o

355Aloha Member

355Aloha

Posted
Posted (edited)

Hi, I have the same problem and the shop here is giving up(PCM and ABS)

Battery is 1.5 years old.

I put a new battery in to test, no change light satill come on, running about 13v

Any other ideas?

Thank You and Aloha

John

Edited by 355Aloha
  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
Hi, I have the same problem and the shop here is giving up(PCM and ABS)

Battery is 1.5 years old.

I put a new battery in to test, no change light satill come on, running about 13v

Any other ideas?

Thank You and Aloha

John

Are both lights on and you get a display message? or just both lights?

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
Loren

Just both lights come on. With a DVM 13.4 13.8 v

Hmm... Check your brake lights. If they do not come on - then that is the cause.

If the brake lights work then you might try a new MAF.

RIC480 Member

RIC480

Posted
  • Author
Posted
Hi, I have the same problem and the shop here is giving up(PCM and ABS)

Battery is 1.5 years old.

I put a new battery in to test, no change light satill come on, running about 13v

Any other ideas?

Thank You and Aloha

John

Are both lights on and you get a display message? or just both lights?

Yes both lights are on and display message "psm not working drve to workshop"

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted
Hi, I have the same problem and the shop here is giving up(PCM and ABS)

Battery is 1.5 years old.

I put a new battery in to test, no change light satill come on, running about 13v

Any other ideas?

Thank You and Aloha

John

Are both lights on and you get a display message? or just both lights?

Yes both lights are on and display message "psm not working drve to workshop"

Then you will likely need to find a shop with a PST or PIWIS tester to diagnose the problem.

355Aloha Member

355Aloha

Posted
Posted

Hi Loren

Brake light work ok.

My wife was behind me when the two light came, we verfied it 4 times.

Voltage 13.4 low to 13.8 high

PS2 rad the following codes 4340 (Stop Light Switch) and P1574 (Brake Pedel Posistion Swith) Note we have put in 3 new switches.

Mahalo

John

judgejon Member

judgejon

Posted
Posted
You've got a PM...

Loren, I give up, what's a PM?

Ric, I had to replace the alternator and battery in my 2003 at about 14k miles. the car had not been driven much when I got it, and the battery had been previously replaced. No problems since, and I drive it pretty much every day. If I'm away for 2-3 days I start it up and drive it around a bit right after unpacking. good luck....

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