Code result
P2084
Exhaust Gas Temperature Sensor Range/Performance
Moderate severity
What it means
The bank 1 sensor 2 EGT reading deviates from the expected ratio against the upstream EGT sensor or modeled exhaust temperature. Confuses DPF regeneration control and may force a forced regen.
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
Sensor aged or drifting
highOne of the most commonly reported causes for this code — check this first.
DPF heavily loaded — non-physical temperature gradient
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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