P0600high severityPowertrain
Serial Communication Link
on 2024 Kia EV9 Light Single Motor RWD · RWD
What this code means
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.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Powertrain codes on this vehicle
P0070
Ambient Air Temperature Sensor Circuit
P0071
Ambient Air Temperature Sensor Range/Performance
P0072
Ambient Air Temperature Sensor Circuit Low
P0073
Ambient Air Temperature Sensor Circuit High
P0115
Engine Coolant Temperature (ECT) Sensor 1 Circuit
P0116
ECT Sensor 1 Circuit Range/Performance
P0117
ECT Sensor 1 Circuit Low Input
P0118
ECT Sensor 1 Circuit High Input
P0119
ECT Sensor 1 Circuit Intermittent
P0125
Insufficient Coolant Temperature for Closed Loop Fuel Control