P22B4

O2 Sensor Negative Current Control Circuit High 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
Increase in harmful emissions

Causes

Bank 1 Sensor 2 Oxygen Sensor Malfunction
Open or short circuit in the sensor control circuit
Damage to the sensor wiring harness
Corrosion of contacts or connectors
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the sensor control circuit
Inspect connectors and wires for damage
Check the resistance of the oxygen sensor
Replace the faulty oxygen sensor if necessary
Scan the ECU for errors

Related codes

P22B5 P22B3 P2237