Code result
P2D45
Reductant Temperature Too Low
High severity
What it means
The reductant temperature is below the calibrated minimum. DEF/AdBlue may not flow correctly through the dosing system - heater fault or extreme cold weather.
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 heater failed
highOne of the most commonly reported causes for this code — check this first.
Extreme ambient cold
mediumA plausible cause — test and verify before replacing parts.
Related help
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