P2C64

O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 3

Moderate severity

The wide-band oxygen sensor on bank 1 sensor 3 reports a pumping current trim circuit high condition. Lambda regulation accuracy is impaired.

Common causes

Trim wire shorted to B+
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $170-770
Open pump cell trim
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $170-770
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P2C64 mean?

P2C64 means "O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 3". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2C64?

trim wire shorted to b+; open pump cell trim; connector pins corroded - high contact resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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