P2610moderate severityPowertrain
ECM/PCM Internal Engine Off Timer Performance
on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD
What this code means
The ECM internal timer that tracks engine-off time is malfunctioning.
Symptoms
- Check engine light
- Incorrect cold-start enrichment
- Extended crank time
Common causes
- ECM internal fault
- Keep-alive memory power loss
- Battery disconnected frequently
Diagnostic steps
- Check ECM keep-alive power circuit
- Verify battery connections
- Check for parasitic drain
Repair notes
Ensure battery and keep-alive circuits are intact. ECM replacement if internal timer failure confirmed.
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P0015
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