Code result
P23BC
NOx Sensor Calibration Memory Bank 1 Sensor 3
Moderate severity
What it means
The NOx sensor on bank 1 sensor 3 reports a calibration memory check-sum failure - factory calibration data corrupted or unreadable.
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
Calibration memory corrupted
highOne of the most commonly reported causes for this code — check this first.
Module software outdated, reflash may resolve
lowLess common, but worth ruling out after the more likely causes.
Supply voltage outside specification
lowLess common, but worth ruling out after the more likely causes.
Related help
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