Engine Error
P2A00
O2 Sensor Circuit Range/Performance (Bank 1 Sensor 1)
Severity
Medium
Symptoms
Poor fuel economy, rough idle, surging, check engine light
Common Causes
- Aging/Sluggish upstream O2 sensor
- Exhaust manifold leak
- Vacuum leak
- Contaminated fuel or oil burning
How to Fix
- 1 Replace Bank 1 Sensor 1 O2 sensor
- 2 Tighten or replace exhaust manifold gasket
- 3 Smoke test for vacuum leaks
- 4 Address oil consumption issues
Estimated Repair Cost
USD
$150
–
$500
O2 Sensor: $150 - $350; Gasket repair: $200 - $400