P0175: System Too Rich — Bank 2
What to do
Expect poor economy and possibly a fuel smell. Worth prompt attention to protect the catalytic converter. Note whether P0172 is also stored — the pairing changes what to suspect.
What this code means
The same rich condition as P0172, measured on bank 2. Read alongside P0172: one bank alone points at that bank's injectors or oxygen sensor, both banks together at shared causes such as excessive fuel pressure, a restricted air filter, an over-reporting airflow sensor, or a saturated charcoal canister venting fuel vapour into the intake.
Likely causes
Start here
- Leaking fuel injector · moderate
- Excessive fuel pressure · moderate
- Restricted air filter · easy
- Contaminated or failing mass air flow sensor · easy
- Saturated charcoal canister · moderate
Less common
- Faulty engine coolant temperature sensor · easy
- Faulty oxygen sensor · easy
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P0175.