P0175 on a Honda: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

Drivable for a short time, but a rich mixture wastes fuel and can damage the catalytic converter, so fix it soon.

What P0175 means on a Honda

On a Honda, P0175 means bank 2 is running rich — too much fuel or not enough air. This code only appears on Honda V6 models, since four-cylinder engines have just one bank. A faulty oxygen sensor or a dirty mass air flow sensor is the usual cause.

Is P0175 common on Hondas?

P0175 shows up on Honda V6 models like the Accord V6, Odyssey, Pilot, and MDX. On higher-mileage Hondas the oxygen sensors and mass air flow sensor are common wear items. An exhaust leak ahead of the bank 2 sensor can also cause a false rich reading.

Commonly reported on: Accord, Odyssey, Pilot, MDX.

Symptoms

Check engine light is on
Poor fuel economy
Strong fuel smell
Rough idle

Common causes

most common: Faulty bank 2 oxygen sensor
common: Dirty or failing mass air flow sensor
common: Exhaust leak ahead of the bank 2 sensor
less common: Leaking fuel injector on bank 2

How to fix it

Fix	DIY?	Typical cost
Replace the bank 2 oxygen sensor	Yes	$60–200
Clean or replace the mass air flow sensor	Yes	$10–250
Repair the exhaust leak ahead of the sensor	Mechanic	$100–300

Frequently asked questions

Can I drive my Honda with a P0175 code?

Yes for a short time, but fix it soon. A rich mixture wastes fuel and can damage the catalytic converter.

Why does P0175 happen on Hondas?

It only affects V6 models, and the oxygen sensors and mass air flow sensor are the most common wear items. An exhaust leak can also cause a false reading.

How much does it cost to fix P0175 on a Honda?

Usually $60–200 for a sensor replacement, plus $100–300 if an exhaust leak needs repair.