U1120

Possible causes
- Can 'C' Bus Circuit harness is open or shorted
- Faulty Anti-Lock Brake System (ABS) harness is open or shorted
- Faulty Powertrain Control Module (PCM)
 
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

U1120 Dodge Description

The Powertrain Control Module (PCM) doesn't receive a wheel distance message from the Anti-lock brake Module or FCM (NON-ABS) over the CAN C bus. One trip fault.