P0172 on HONDA CIVIC — System Too Rich Bank 1

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

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

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

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

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

"Of 2 NHTSA reports for this code on HONDA CIVIC, 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 CIVIC 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 CIVIC

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 CIVIC owners have reported this issue to NHTSA across model years 2018-2021. Most reports come from the 2018, 2021 model years. The most commonly reported component is Fuel/Propulsion System (50.0% of reports).

Real HONDA CIVIC Owner Reports

Source: NHTSA Complaints Database

"Car has been triggering engine code P0172, P219D, related to fuel mix being too rich in the cylinders. When I went to order fuel injectors for the vehicle to replace, they are backordered with no date or new part number provided."

— 2018 HONDA CIVIC owner · FUEL/PROPULSION SYSTEM · Filed 02/17/2024

"Our battery died in April 2025. We've had this car since October 2021 with only 8 miles on it."

— 2021 HONDA CIVIC owner · ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM · Filed 04/07/2025

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

📊 Complaint Trend by Model Year

1

'18

1

'21

Common Causes on HONDA CIVIC

Based on NHTSA complaint component analysis for this vehicle.

FUEL/PROPULSION SYSTEM 50%

ELECTRICAL SYSTEM,FUEL/PROPULSION SYSTEM 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 CIVIC? ▾

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

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

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

Is P0172 serious on my HONDA CIVIC? ▾

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

What should I do if my HONDA CIVIC 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.