Code result
P2C64
O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 3
Moderate severity
What it means
The wide-band oxygen sensor on bank 1 sensor 3 reports a pumping current trim circuit high condition. Lambda regulation accuracy is impaired.
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
Trim wire shorted to B+
highOne of the most commonly reported causes for this code — check this first.
Open pump cell trim
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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