Fuel Trim Cylinder Balance Bank 2
2004-2007 Buick Rainier 4.2L I6
Description
The PCM detected a rich or lean cylinder-to-cylinder air/fuel ratio imbalance on Bank 2. This is the Bank 2 counterpart to P1174 and the underlying causes are identical. The two codes frequently appear together.
Symptoms
- Check Engine Light
- Rough idle
- Poor fuel economy
- Hesitation during acceleration
- Intermittent misfires
- Engine stalling (severe cases)
Common Causes
- Clogged or restricted fuel injector(s)
- Faulty upstream O2 sensor Bank 2
- Vacuum leak on Bank 2
- Dirty MAF sensor
- Cylinder misfire on Bank 2
- AFM lifter failure (V8 engines)
Diagnostic Steps
- Check fuel trim values with scan tool
- Perform injector balance test
- Inspect for vacuum leaks
- Clean or replace MAF sensor
- Test upstream O2 sensor Bank 2
- Check for cylinder misfires
Repair Notes
Same diagnostic approach as P1174. Clogged injectors are a common GM issue per TSB #03-06-04-030F. Try high-octane fuel with injector cleaner additive first.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1175 on Other Vehicles
Common Questions
What does code P1175 mean on a 2004-2007 Buick Rainier?
P1175 stands for "Fuel Trim Cylinder Balance Bank 2". The PCM detected a rich or lean cylinder-to-cylinder air/fuel ratio imbalance on Bank 2. This is the Bank 2 counterpart to P1174 and the underlying causes are identical. The two codes frequently appear together.
What are the symptoms of P1175 on a Buick Rainier?
Common symptoms of P1175 include: Check Engine Light, Rough idle, Poor fuel economy, Hesitation during acceleration, Intermittent misfires, Engine stalling (severe cases).
What causes P1175 on a 2004-2007 Buick Rainier?
Common causes of P1175 include: Clogged or restricted fuel injector(s), Faulty upstream O2 sensor Bank 2, Vacuum leak on Bank 2, Dirty MAF sensor, Cylinder misfire on Bank 2, AFM lifter failure (V8 engines).