P0159

O2 Sensor Circuit Slow Response Bank 2 Sensor 2

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Unstable engine operation
Increased emissions of harmful substances
Check Engine Light Is On

Causes

Oxygen sensor malfunction
Sensor contamination
Wiring harness damage
Poor contact in the sensor connector
Grounding problems

How to Fix

Check the condition of the oxygen sensor
Check the integrity of the wiring harness
Clean connector contacts
Replace sensor if necessary
Reset the error and check the system operation

Related codes

P0139 P0140 P0158 P0160