The Lemon IndexBank 1 is getting too much fuel.
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
Leaking injector. Then: faulty fuel pressure regulator; dirty MAF sensor.
Owners named P0172 in 96 complaints to the U.S. government, most often on the Honda CR-V.
Models that report it most
Complaints that name P0172, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.
P0172 by model: P0172 Honda CR-V (53)
Years owners report it on most: 2017 Honda CR-V · 2018 Honda CR-V · 2019 Honda CR-V · 2020 Honda Accord · 2015 Honda Fit · 2018 Honda Civic
The details
What P0172 means
Bank 1 is getting too much fuel. You may smell fuel or see worse mileage.
Can I drive with P0172?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
34% of the owner complaints that name P0172 also say the car warning lights and electrical faults. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0172
- Leaking injector
- Faulty fuel pressure regulator
- Dirty MAF sensor
- Faulty O2 sensor
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Warning lights and electrical faults: 34% of complaints
- Shakes, runs rough or misfires: 30% of complaints
- Stalls or shuts off: 22% of complaints
- Loses power or goes into limp mode: 20% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0172 most
2017 Honda CR-V (26), 2018 Honda CR-V (15), 2019 Honda CR-V (10), 2020 Honda Accord (3), 2015 Honda Fit (2), 2018 Honda Civic (2).
Related codes
P0171 P0170 P0174 P0175 P0190 P0191 P0192 P0193
Quick answers
What does P0172 mean?
System Too Rich (Bank 1). Bank 1 is getting too much fuel. You may smell fuel or see worse mileage.
Can I drive with P0172?
Get it fixed soon. A few more days of normal driving is usually OK, but waiting can turn a small repair into a bigger one or a breakdown.
What causes P0172?
Leaking injector; Faulty fuel pressure regulator; Dirty MAF sensor; Faulty O2 sensor.
Counts: NHTSA owner complaints whose text names P0172. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.