Code result
P2627
O2 Sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1
Moderate severity
What it means
On a wide-band (broadband) O2 sensor, the trim resistor circuit that calibrates the pumping current is reading low on bank 1 sensor 1. Air-fuel feedback gain is wrong, causing rich or lean offsets.
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
Short in the calibration trim resistor
highOne of the most commonly reported causes for this code — check this first.
Water intrusion in the sensor connector
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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