P22B2

O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Reduced engine power
Unstable engine operation at idle
Dips during acceleration

Causes

Broken or damaged oxygen sensor wiring
Malfunction of the oxygen sensor (lambda probe)
Poor contact in the sensor connector
Short circuit in control circuit
Malfunction of the engine control unit (rare)

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the resistance and voltage in the sensor circuit
Check the functionality of the oxygen sensor
Replace sensor if necessary
Clear error codes and check if error is returned

Related codes

P22B1 P22B3 P0138