spr10r

it was my birthday last week, so despite some snow still being around I took out my car for the first time since late Nov. It was fabulous, and no problems starting or running. I took it out again yesterday (after 1 week of no use) and after 10 mins and 2 miles (terrible gravel and post ice-melt road break up on the road to my house) the check engine light came on. I filled the 50% tank with fresh fuel, but the light is still coming on 2 seconds after start-up. Any ideas what I should check? Dealer is a mountain pass away, and the roads aren't up to driving it there yet....

kailuadog

I would check or charge the battery if it sat that long.

My c4s did the same when I didn't drive it for 3 months.

FYI....Porsche says that the battery is covered under warranty but only if the car is driven 6000 miles a year.

Aloha.

sharkster

is the code p0503 by any chance? Get an OBDII scanner for 80 bucks and let us know what the code is and someone on here can tell you what it means. Then reset it

rnlarctic997

Might want to check the fuel filler cap...once I didn't have on tight enough and the check engine light came on. Generally though, these engines are sensitive to emissions type faults. Most of the time, if it's not a serious 'fault' and it has to do with the emissions algorithim on the computer, it will clear itself and reset in a day or two. If it doesn't clear, then a trip over the mountains for you...

spr10r

finally got a reader: P0492. Any thoughts?

MJSpeed

O2 sensor?

amondc

P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow
P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow

Possible cause of fault
- Electrical fault in power supply or line between relay and secondary air injection pump
- Secondary air injection pump relay mechanically faulty
- Mechanical fault in electrical secondary air valve
- Pneumatic secondary air valve faulty/sluggish
- Electrical fault in secondary air injection pump
- Mechanical fault in secondary air injection pump or secondary air injection pump blocked
- Vacuum system leaking
- Air hose to secondary air injection pump slipped off or constricted

fmw383

what is it if it does have a p0503

malmasri

What year is your GT3. What was the Ambient temp when you ran the vehicle?

Surfer2001

i got this code yesterday? anybody know whats needed, it wont clear

LexVan

P0503 Vehicle SPeed Sensor Intermittent/Erratic/High

How far did you dirve it?

Surfer2001

about 3 miles

LexVan

Was the battery disconnected?

FYI- I found your code here:

https://rennlist.com/forums/997-foru...-to-p3493.html

Surfer2001

Yes, i saw its a speed sensor issue.

LexVan

Did you also get the PSM warning? That's pretty common after a battery disconnect. I think it should clear. It usually clears after a mile. Maybe you just need to drive further??