P20B6 Possible Causes
- Faulty reductant metering unit heater control
- Reductant metering unit heater control harness is open or shorted
- Reductant metering unit heater control circuit electrical connection
What Does It Mean?
How to Fix Code P20B6
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.
P20B6 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
P20B6 Meaning
Reductant metering unit heater control circuit performance is the generic description for code P20B6, but the manufacturer may have a different description.