Code result
P202D
Reductant Leakage
Moderate severity
What it means
A leak has been detected in the DEF (urea) supply system — usually by a pressure-decay test after pump shutdown, or by visible crystallisation around fittings.
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
Cracked DEF line or fitting
highOne of the most commonly reported causes for this code — check this first.
Pump seal leaking
mediumA plausible cause — test and verify before replacing parts.
Injector mounting seal leaking
mediumA plausible cause — test and verify before replacing parts.
Related help
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