Code result
P2A3A
O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 3
Moderate severity
What it means
Voltage on the wide-band oxygen sensor positive pump current line of bank 1 sensor 3 is above the expected window. Wire shorted to B+ or pump cell open.
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
Pump current wire shorted to B+
highOne of the most commonly reported causes for this code — check this first.
Open pump cell
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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