P20C9 Possible Causes
- Faulty Reducer Control Module
- Reducer Control Module Harness is Open or Shorted
- Reducer Control Module Circuit Poor Electrical Connection
What Does It Mean?
How to Fix Code P20C9
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P20C9 Possible Symptoms
Engine Light On (or Service Engine Soon Warning Light)
P20C9 Meaning
MIL illumination required for Reducer Control Module is the generic description for code P20C9, but the manufacturer may have a different description