Code result
P2237
O2 Sensor Pumping Current Circuit
High severity
What it means
The pumping current line of the wide-band lambda sensor on bank 1 sensor 1 is unable to operate. Wide-band sensors regulate exhaust oxygen to a reference cell via this pumping current — without it, AFR cannot be measured.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Pumping current line open
highOne of the most commonly reported causes for this code — check this first.
Wide-band sensor failed
mediumA plausible cause — test and verify before replacing parts.
Related help
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