TorqueMech OBD Code Guide
P0175 - System Too Rich (Bank 2)
The engine is running rich on bank 2.
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Check likely system
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Common Next Steps
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Review fuel trims
Compare trims at idle, 2500 RPM, and cruise before pricing sensors.
Inspect vacuum leaks
Check intake boots, PCV hoses, and post-MAF leak paths.
Check MAF sensor
Inspect MAF contamination and airflow data after intake leaks are considered.
Inspect intake tubing
Look for cracked ducts, loose clamps, and unmetered air after the MAF.
Related Inspection
Code Overview
The engine is running rich on bank 2.
Common Causes
- Leaking injector on bank 2
- Fuel pressure too high or regulator fault
- Dirty or skewed mass air flow sensor
- Coolant temperature sensor reading colder than actual
- Restricted intake airflow
Symptoms
- Fuel smell from the exhaust
- Rough idle or loaded-up running
- Poor fuel economy or black soot at the tailpipe
Diagnostic Steps
- Check short- and long-term fuel trims to confirm the rich condition on bank 2
- Inspect for leaking injectors or fuel odor and check fuel pressure
- Review MAF and coolant-temperature readings for values that do not make sense
- Inspect the air filter and intake tract for restriction
Repair Difficulty
Moderate
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Related OBD Codes
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Next Steps
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