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All codes/P22BF

P22BF

O2 Sensor Negative Current Control Circuit/Open

High severity

The negative (sinking) side of the O2 sensor pumping current control circuit on bank 2 sensor 2 is open.

The negative (sinking) side of the O2 sensor pumping current control circuit on bank 2 sensor 2 is open.

Common causes

  • Open negative current line

    One of the most commonly reported causes for this code — check this first.

    high

    Typical part cost: $90-550

  • Pin pushed back out of connector body

    Less common, but worth ruling out after the more likely causes.

    low

    Typical part cost: $90-550

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First things to check

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

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Tools you may need

Already have a compatible scanner? Use it. If not, a Bluetooth OBD2 adapter can help you confirm engine codes and check supported live sensor data before replacing parts.

Illustration of a Bluetooth OBD2 adapter, not a product photo

Basic checks

Veepeak OBDCheck BLE

A Bluetooth LE adapter for reading standard engine codes and supported live data.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Regular diagnostics

vgate iCar Pro BLE 4.0

A Bluetooth LE adapter with an automatic sleep feature for routine code and sensor checks.

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Illustration of a Bluetooth OBD2 adapter, not a product photo

Another option

OBDLink CX

A Bluetooth LE adapter to consider when comparing supported vehicles and diagnostic apps.

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Illustrations shown, not product photos. Check vehicle, phone and app compatibility before buying. These adapters do not guarantee access to ABS, airbags or manufacturer-specific systems. Clearing a code does not repair the fault and can reset emissions readiness monitors.

As an Amazon Associate, Wrenchify earns from qualifying purchases. This supports the app at no extra cost to you.

Related codes

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Frequently asked questions

What does P22BF mean?

P22BF means "O2 Sensor Negative Current Control Circuit/Open (Bank 2 Sensor 2)". It is a generic OBD-II code that points to a fault in the throttle actuator / turbocharger / boost control.

What are the most common causes of P22BF?

open negative current line; pin pushed back out of connector body; cracked solder joint inside the module or sensor — 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?

This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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