Code result
P237A
O2 Sensor Exhaust Sample Error Bank 1 Sensor 2
Moderate severity
What it means
O2 Sensor Exhaust Sample Error Bank 1 Sensor 2: the control module has detected this fault condition. (Code P237A)
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
Sensing element or protective tube fouled with soot, oil or coolant
highOne of the most commonly reported causes for this code — check this first.
Sensor seal or thread leaks - bypass air dilutes sample
mediumA plausible cause — test and verify before replacing parts.
Related help
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