P208E: Reductant Injection Valve Stuck Closed (Bank 1 Unit 1)
Standardized SAE J2012 code · P20xx — Fuel & air metering and auxiliary emission controls
What does P208E mean?
The DEF injection valve at bank 1 unit 1 does not open when commanded — typically crystallised DEF blocks the nozzle, no flow into the SCR.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Common causes
- High Nozzle crystallised
- Medium Valve seized
- Low Carbon or debris buildup preventing free movement
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P208E on the same make and model first.
P208E in the community
Ask about P208ENo one has posted about P208E yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P208E problem