P20A6 Possible Causes
- Faulty reductant injection air pressure control valve
- Reductant injection air pressure control valve harness is open or shorted
- Poor electrical connection in reductant injection air pressure control valve circuit
What Does It Mean?
How to Fix Code P20A6
Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P20A6 Possible Symptoms
Engine light on (or service engine soon warning light)
P20A6 Meaning
Reductant injection air pressure control valve circuit/open is the generic description for code P20A6, but the manufacturer may have a different description.