Code result
P2BA8
NOx Exceedence - Interruption of Reagent Dosing Activity
High severity
What it means
NOx emissions are above the legal threshold and the ECU isolates the cause to interruption of reductant dosing. The injection valve, pump, or supply line is impaired.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Reductant injection valve clogged
highOne of the most commonly reported causes for this code — check this first.
Reductant pump output insufficient
mediumA plausible cause — test and verify before replacing parts.
Related help
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