P20B8 Possible Causes
- Faulty reductant measurement unit heater control
- Reductant measurement unit heater control circuit open or shorted
- Reductant measurement unit heater control circuit electrical connection
What Does It Mean?
How to Fix Code P20B8
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.
P20B8 Possible Symptoms
Engine light on (or service engine soon warning light)
P20B8 Meaning
Reductant measurement unit heater control circuit high is the generic description for code P20B8, but the manufacturer may have a different description.