Code result
P23B7
NOx Sensor Heater Control Circuit Range or Performance Bank 1 Sensor 3
Moderate severity
What it means
Same as P23B1 with the heater control loop in plausible range yet not matching the heater model - aged heater or harness resistance.
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 element aged
highOne of the most commonly reported causes for this code — check this first.
Related help
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