Code result
P20E2
Reductant Pressure Too High
Moderate severity
What it means
The reductant line pressure exceeds the upper limit. A blocked return path, a stuck pump or a faulty pressure sensor are common causes; over-pressure can damage the dosing valve and the pump head.
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
Return line blocked or frozen
highOne of the most commonly reported causes for this code — check this first.
Pressure sensor reads high
mediumA plausible cause — test and verify before replacing parts.
Dosing valve stuck closed
mediumA plausible cause — test and verify before replacing parts.
Related help
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