P237A

O2 Sensor Exhaust Sample Error Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–89 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Check Engine light comes on
Reduced engine power
Increased emissions of harmful substances

Causes

Bank 1 Sensor 2 Oxygen Sensor Malfunction
Damage to sensor wiring or connectors
Sensor contamination due to oil or coolant leak
Exhaust system problems (leaks, damage)
Malfunction of the catalytic converter

How to Fix

Check the status of the oxygen sensor Bank 1 Sensor 2
Inspect wiring and connectors for damage
Clean or replace sensor if necessary
Check the exhaust system for leaks
Diagnose the condition of the catalytic converter

Related codes

P0137 P0138 P0140 P2270