Trouble code · Powertrain · Generic (all makes)

P0175 System Too Rich (Bank 2)

The same as P0172, but for bank 2 on engines with two banks (V6, V8): too much fuel for the amount of air, and the computer has run out of room to correct it.

Safe to drive?
Usually OK to drive
Get it checked soon
Scanner you need
Any OBD2 scanner
Even a basic code reader shows it
NHTSA complaints quoting it
11
Vehicle complaints, 2015–2025

Common causes

  • Leaking or stuck-open fuel injector on bank 2
  • Faulty fuel pressure regulator
  • Dirty or faulty MAF sensor
  • Faulty coolant temperature sensor

Symptoms

  • Poor fuel economy
  • Black smoke
  • Fuel smell
  • Rough idle

Can I drive with it?

Usually safe to drive short term, but running rich wastes fuel and can damage the catalytic converter.

Tip: If P0172 and P0175 appear together, look for something both banks share – fuel pressure or the MAF sensor.

Which scanner reads it?

Any OBD2 scanner reads it. Fuel trim and oxygen sensor live data are the key to finding the cause.

Budget tools like the ANCEL AD310 read it; tools with live data and graphing – like the BlueDriver or OBDLink MX+ – help you find the cause. Not sure which fits you? Try the Find My Scanner quiz.

In the data

Of the vehicle complaints owners filed with NHTSA from 2015 to 2025, 11 quote P0175 – most often from Chrysler, Dodge, Honda owners. Complaints lean toward serious problems, so treat this as a sign of how often the code turns up in real reports, not how often cars get it.

Both sources are compared on the Trends page.

General information to help you understand a code – not a diagnosis. Your car’s service information or a qualified mechanic has the final word. See how we research.