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After a 2 hrs. fast drive. I parked my '07 911s for 30 mins. than restarted and it cranked slowly and did not start. I reset the key position and same result however i *think* I saw "Diagnostic Mode" displayed on the dash. The third restart was normal and everything fine, no faults.
The battery is 5 years old. I'm replacing it tomorrow just for drill.
After a 2 hrs. fast drive. I parked my '07 911s for 30 mins. than restarted and it cranked slowly and did not start. I reset the key position and same result however i *think* I saw "Diagnostic Mode" displayed on the dash. The third restart was normal and everything fine, no faults.
The battery is 5 years old. I'm replacing it tomorrow just for drill.
If anyone has a clue, it might be reassuring!
Diagnostic mode shows up when battery voltage drops very low, on a dead battery for example. Might be battery, or starter/ alternator cable if it is difficult to start with a warm engine. Report back if the new battery cured the problem.
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