C0391High Severity
Chassis / ABS System Fault (Node 0391)
This diagnostic trouble code indicates a malfunction in the associated component circuit.
Common Symptoms of C0391
- ABS Warning Light
- Traction Control disabled
What Causes the C0391 Code?
- Wheel speed sensor failure
- ABS module fault
How serious is the C0391 code?
Because this code has a high severity level, it is highly recommended to address it promptly. Driving with an active C0391 fault can lead to secondary component failures and decreased fuel economy.
How do you definitively diagnose and fix C0391?
To accurately diagnose the C0391 fault code, you need the exact OEM wiring diagram and diagnostic test procedures for your specific vehicle. Create an Auto Fix Data account to instantly pull the factory diagrams for this fault.
Fix C0391 Now
Access the OEM repair manual and interactive wiring diagram to diagnose this exact code.
- Pin-to-pin wiring diagrams
- Component testing steps
- Technical Service Bulletins
- Identifix confirmed fixes
Related Fault Codes
P0001
Fuel and Air Metering System Malfunction (Circuit 0001)
P0002
Fuel and Air Metering System Malfunction (Circuit 0002)
P0003
Fuel and Air Metering System Malfunction (Circuit 0003)
P0004
Fuel and Air Metering System Malfunction (Circuit 0004)
P0005
Fuel and Air Metering System Malfunction (Circuit 0005)
P0006
Fuel and Air Metering System Malfunction (Circuit 0006)