P20A8 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 P20A8
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.
P20A8 Possible Symptoms
Engine light on (or service engine soon warning light)
P20A8 Meaning
Reductant injection air pressure control valve circuit low is the generic description for code P20A8, but the manufacturer may have a different description.