P2A04

O2 Sensor Circuit Range/Performance Bank 2 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 engine idling
Dips during acceleration

Causes

Oxygen sensor malfunction (bank 2, sensor 2)
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the catalytic converter
Leaks in the exhaust system

How to Fix

Check the condition of the oxygen sensor and its connector
Check the integrity of the sensor circuit wires
Check the voltage and resistance in the sensor circuit
Check the exhaust system for leaks
If necessary, replace the oxygen sensor

Related codes

P2A00 P2A03 P2A05