P2A02

O2 Sensor Circuit Range/Performance Bank 1 Sensor 3

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check engine light comes on
Slight increase in fuel consumption
Reduced catalytic converter efficiency
Minor dips in power possible
Increased level of harmful emissions

Causes

Faulty oxygen sensor Bank 1 Sensor 3
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Sensor contamination with combustion products
Malfunction of the catalytic converter

How to Fix

Check the condition of the sensor connectors and wiring
Visually inspect the sensor for damage
Check the sensor readings using a diagnostic scanner
Clean or replace the oxygen sensor if necessary
Check the condition of the catalytic converter

Related codes

P2A00 P2A01 P2A03