P237B

O2 Sensor Exhaust Sample Error Bank 2 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Possible increase in fuel consumption
Minor loss of engine power
Possible unstable idle speed
Dips during acceleration

Causes

Bank 2 Sensor 2 oxygen sensor malfunction
Open or short circuit in sensor wiring
Sensor contamination with combustion products
Exhaust system leaking
Problems with the catalytic converter

How to Fix

Check the integrity of the wiring to the sensor
Inspect the sensor for damage and dirt
Check the exhaust system for leaks
Check the performance of the catalytic converter
If necessary, replace the oxygen sensor

Related codes

P237A P237C P0138