Code result
P200C
Particulate Filter Over Temperature
High severity
What it means
A temperature sensor at the diesel particulate filter (DPF) on bank 1 has exceeded the safe limit — typically during a runaway regeneration. Continued operation can melt or crack the substrate.
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
Excessive soot load triggers runaway regeneration
highOne of the most commonly reported causes for this code — check this first.
Post-injection over-fueling during regeneration
mediumA plausible cause — test and verify before replacing parts.
DPF temperature sensor reading drifts high
lowLess common, but worth ruling out after the more likely causes.
Related help
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