P2A03

Symptoms

• Check Engine light comes on
• Increased fuel consumption
• Unstable engine operation
• Reduced engine power
• Increase in harmful emissions

Causes

• Bank 2 Sensor 1 Oxygen Sensor Malfunction
• Damaged or corroded sensor wiring
• Poor contact in the sensor connector
• Leaks in the exhaust system
• Problems with the fuel system (lean or rich mixture)

How to Fix

1. Check the sensor signal using a scanner
2. Inspect the wiring and sensor connector for damage
3. Check the exhaust system for leaks
4. Replace the oxygen sensor if necessary
5. Clean or replace connector if there is corrosion.

Related codes

Error P2A03 by Vehicle Brand