Code result
P223A
Reductant Heater E Control Circuit
High severity
What it means
Reductant Heater E Control Circuit: the control circuit has an electrical fault. The reductant (DEF/AdBlue) heater keeps the urea fluid from freezing; a fault can impair SCR dosing in cold conditions.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Heater winding or wiring fault
highOne of the most commonly reported causes for this code — check this first.
Related help
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