P0172 on HONDA FIT — System Too Rich Bank 1

Q: "What does P0172 mean on a HONDA FIT?"

"P0172 indicates: System Too Rich Bank 1. This is a fuel and air metering code. 2 HONDA FIT owners have reported this to NHTSA."

Q: "What are the most common causes of P0172 on HONDA FIT?"

"Based on 2 NHTSA reports, the most commonly cited components are: Engine,Fuel/Propulsion System, Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0172 serious on my HONDA FIT?"

"Of 2 NHTSA reports for this code on HONDA FIT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HONDA FIT shows P0172?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0172 Means on Your HONDA FIT

P0172 is a diagnostic trouble code indicating: System Too Rich Bank 1. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 HONDA FIT owners have reported this issue to NHTSA across model years 2015-2018. Most reports come from the 2015, 2018 model years. The most commonly reported component is Engine,Fuel/Propulsion System (50.0% of reports).

Real HONDA FIT Owner Reports

Source: NHTSA Complaints Database

"P0303 misfire cylinder 4; checked live data, all cylinders misfiring. recommended to replace all fuel injectors and fuel pipe due to "known issues with direct fuel injectors" as stated by honda dealership. car idles roughly."

— 2015 HONDA FIT owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 12/18/2019

"This is after the recall on 2018-19 Fit Carbon Buildup with Misfire DTCs under codes P0300-P0304) and after fuel injectors are replaced. Current problem is with combination of carbon deposits on intake valves. Failing fuel injector/s causing an incorrect air/fuel ratio with code under P0172."

— 2018 HONDA FIT owner · ENGINE · Filed 09/03/2025

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'15

1

'18

Common Causes on HONDA FIT

Based on NHTSA complaint component analysis for this vehicle.

ENGINE,FUEL/PROPULSION SYSTEM 50%

ENGINE 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0172 mean on a HONDA FIT? ▾

P0172 indicates: System Too Rich Bank 1. This is a fuel and air metering code. 2 HONDA FIT owners have reported this to NHTSA.

What are the most common causes of P0172 on HONDA FIT? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Engine,Fuel/Propulsion System, Engine. These percentages are based on the component field in owner complaints.

Is P0172 serious on my HONDA FIT? ▾

Of 2 NHTSA reports for this code on HONDA FIT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HONDA FIT shows P0172? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.