Code result
P23B5
NOx Sensor Heater Sense Circuit Range or Performance Bank 1 Sensor 3
Moderate severity
What it means
Same as P23B4 with the sense voltage in plausible range yet not matching the heater model.
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
Heater current drifted
highOne of the most commonly reported causes for this code — check this first.
Related help
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