Serial Communication Link
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
Description
Malfunction in the serial data communication link between the PCM and other modules.
Symptoms
- Check Engine Light
- Multiple warning lights
- Communication errors on scan tool
- Some modules not responding
Common Causes
- Faulty CAN bus wiring
- PCM failure
- Module failure on bus
- Terminated resistor issue
- Aftermarket device interfering with bus
Diagnostic Steps
- Check for aftermarket devices on OBD-II port
- Test CAN bus wiring
- Check bus termination resistors
- Scan all modules for communication
- Inspect wiring for damage
Repair Notes
Check for aftermarket devices first. Then check CAN bus wiring. PCM replacement is rare.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0600 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code P0600 mean on a 2018-2025 Fiat Cronos?
P0600 stands for "Serial Communication Link". Malfunction in the serial data communication link between the PCM and other modules.
What are the symptoms of P0600 on a Fiat Cronos?
Common symptoms of P0600 include: Check Engine Light, Multiple warning lights, Communication errors on scan tool, Some modules not responding.
What causes P0600 on a 2018-2025 Fiat Cronos?
Common causes of P0600 include: Faulty CAN bus wiring, PCM failure, Module failure on bus, Terminated resistor issue, Aftermarket device interfering with bus.