Engine Error
P2A03
O2 Sensor Circuit Range/Performance (Bank 2 Sensor 1)
Severity
Medium
Symptoms
Check engine light, engine hesitation, increased emissions
Common Causes
- Defective Bank 2 upstream O2 sensor
- Bank 2 exhaust leak
- MAF sensor issues
- Fuel pressure problems
How to Fix
- 1 Replace upstream O2 sensor on Bank 2
- 2 Fix exhaust leaks
- 3 Clean MAF sensor
- 4 Test fuel pressure
Estimated Repair Cost
USD
$150
–
$400
O2 sensor replacement: $150 - $350