Code result
U0622
Lost Communication With Exhaust Gas Temperature Sensor Bank 2 Sensor 2
Moderate severity
What it means
The vehicle bus reports loss of communication with smart exhaust gas temperature sensor bank 2 sensor 2 (typically post-cat). Catalyst protection and DPF regeneration logic switch to model-based estimates.
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
Bus wiring open or shorted
highOne of the most commonly reported causes for this code — check this first.
Module without power or ground
mediumA plausible cause — test and verify before replacing parts.
Module failed
mediumA plausible cause — test and verify before replacing parts.
Related help
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