Last reported case: 2 years ago
Based on 5 owner reports, 5 from forums)
What is P0171?
P0171 indicates your engine's Bank 1 is running with too much air and not enough fuel, which is called a 'lean' condition. This is a medium-severity powertrain issue that can reduce fuel economy and performance, and it's commonly triggered by vacuum leaks or faulty sensors. Based on 551 reports, repairs for this code average $4596, with Ford Mustangs and F-150s being among the most frequently affected vehicles.
Common Causes:
- Vacuum leaks in intake hoses or gaskets (reported in numerous discussion clusters)
- Faulty mass airflow (MAF) or oxygen (O2) sensors
- Clogged or failing fuel injectors
- Fuel delivery issues like a weak fuel pump or clogged filter
Symptoms:
- Check Engine Light is illuminated
- Reduced engine power or hesitation during acceleration
- Poor fuel economy
- Rough idle or engine misfires
🚗P0171 on 2020 HONDA Accord
This page focuses specifically on P0171 issues reported by 2020 HONDA Accord owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2020 HONDA Accord Owners:
Parts Often Involved:
What Owners Say
Real experiences from 2020 HONDA Accord owners
“So I have scanned it and all I’m getting is system lean bank 1 and 2 but no other codes. I have tried a few things I changed intake mani gaskets Sprayed with starter fluid for vacuum leaks there aren’t any I had to change the gas cap because at some point I got an evap code (fixed) Tried a fuel system cleaner Now I’m stuck, anyone dealt with this issue before because I need to have my car inspected for registration and it won’t pass with the CEL”View original
“I believe the pending code will show when it was set based on mileage and number of run cycles. Depending on the tool it may be called historic code or pending code.”View original
“I scanned it one day with torque pro app just to see basic stats of the car (got bored) and found it lol. My MAF seems pretty clean, my filter is clean, my intake (aFe SRI) is tight nothing loose around the TB.”View original
“My MAF seems pretty clean, my filter is clean, my intake (aFe SRI) is tight nothing loose around the TB. Had the intake for over 1.5yrs no codes or problems before.”View original
“The P0170 can be a pending code, so my guess is this is an old pending code. I believe the pending code will show when it was set based on mileage and number of run cycles.”View original
“I have tried a few things I changed intake mani gaskets Sprayed with starter fluid for vacuum leaks there aren’t any I had to change the gas cap because at some point I got an evap code (fixed) Tried a fuel system cleaner Now I’m stuck, anyone dealt with this issue before because I need to have my car inspected for registration and it won’t pass with the CEL”View original
“My mechanic said that it's probably a leak in the fuel lines without checking. Before I dish out getting all my fuel lines replaced, are there any other possible reasons?”View original
“There are no visible leaks under the car. My mechanic said that it's probably a leak in the fuel lines without checking.”View original
These are real experiences shared by 2020 HONDA Accord owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 5 discussions about P0171 from 2020 HONDA Accord owners across automotive communities.
Success rate (20%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 9/3/2023