P22B5

O2 Sensor Pumping Current Trim 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 operation at idle
Dips during acceleration

Causes

Oxygen sensor circuit open
Poor contact in the sensor connector
Malfunction of the oxygen sensor itself
Wiring harness damage
Problems with the engine control unit

How to Fix

Check the integrity of the wiring to the oxygen sensor
Check the contacts in the sensor connector for oxidation and corrosion.
Test the oxygen sensor with a multimeter
Replace the oxygen sensor if necessary
Reset the error code and check if it returns

Related codes

P22B6 P2237 P2238