Engine Error
P0173
Fuel Trim Malfunction (Bank 2)
Severity
High
Symptoms
Decreased fuel economy, check engine light, rough idle
Common Causes
- Vacuum leak specific to Bank 2 intake manifold
- Faulty fuel injectors on Bank 2
- Failed Bank 2 O2 sensor
- Exhaust leak before the O2 sensor
How to Fix
- 1 Inspect Bank 2 intake gaskets
- 2 Clean or replace Bank 2 fuel injectors
- 3 Replace upstream O2 sensor
- 4 Repair exhaust manifold leak
Estimated Repair Cost
USD
$100
–
$800
Intake gaskets: 300 - 600; Injectors: 200 - 500