Code result
P2631
O2 Sensor Pumping Current Trim Circuit High Bank 2 Sensor 1
Moderate severity
What it means
The wide-band trim resistor circuit on bank 2 sensor 1 reads high. Air-fuel feedback gain on bank 2 is wrong, the controller cannot compensate the offset.
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
Open calibration trim resistor
highOne of the most commonly reported causes for this code — check this first.
Corroded sensor connector
mediumA plausible cause — test and verify before replacing parts.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
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