P0175high severityPowertrain
System Too Rich Bank 2
on 2005 Buick Terraza 3.5L V6 · FWD
What this code means
The long-term fuel trim for Bank 2 has exceeded the negative limit, indicating rich running on Bank 2.
Symptoms
- Check Engine Light
- Black smoke
- Poor fuel economy
- Rich exhaust smell
Common causes
- Leaking injector Bank 2
- High fuel pressure
- Faulty O2 sensor Bank 2
- EVAP issue
Diagnostic steps
- Check fuel trim Bank 2
- Test injectors Bank 2
- Test fuel pressure
- Check O2 sensor Bank 2
Repair notes
Same diagnostic approach as P0172 but focused on Bank 2.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1