Code result
P208F
Reductant Injection Valve Stuck Closed
Moderate severity
What it means
The DEF injection valve at bank 2 unit 1 does not open when commanded — typically crystallised DEF blocks the nozzle, no flow into the SCR.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Nozzle crystallised
highOne of the most commonly reported causes for this code — check this first.
Carbon or debris buildup preventing free movement
lowLess common, but worth ruling out after the more likely causes.
Component wear with age - mechanical play
lowLess common, but worth ruling out after the more likely causes.
Related help
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