Code result
P01F1
O2 Sensor Circuit Bank 1 Sensor 4
Moderate severity
What it means
Generic electrical fault on the bank 1, sensor 4 oxygen sensor (fourth sensor downstream — used on systems with multiple cat stages or NOx-trap diagnosis).
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 failed
highOne of the most commonly reported causes for this code — check this first.
Related help
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