P0606Fiat 500Years: 1996 - 2026
ECM/PCM Processor Fault
Reviewed by ASE Certified Technician
What does this mean?
Code P0606 indicates an internal fault within the Fiat Engine Control Module (ECM) or Powertrain Control Module (PCM).
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Fiat 500 models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Advertisement (In-Article)
Common Causes
Internal PCM/ECM failure
PCM/ECM software needs update (TSB)
Weak or failing battery
Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Engine cranks but won't start
- Engine stalling or dying unexpectedly
- Vehicle enters reduced power / limp mode
- Rough or unstable idle