P0172 Honda Code - Fuel System Too Rich Bank 1

obd2 code po172 oxygen sensor heater bank 1

What model and year is your Honda?

can somebody tell me what to do with this:P0172,P0170,P0420 ON HONDA ACCORD 2001, 1.8---GAS

Some inspection needs to be done to properly determine the cause of the problem, but you could have a bad O2 sensor or catalytic converter, or both.

my name is Juan and i have replaced the o2 sensor and the intake air control valve the map sensor and clean out the throttle body. i still have the p0172 code kicking in with a p0170. i spoke to a friend and states it could be that there’s a leak right at the first o2 or right after that its not reading the properly. i did have a timing belt done and had to take off the down pipe but didn’t replace the gasket. if its the cat i could have problems going a certain speed i was told. but yeah. ill will update this info if anything and let you guys know if it was the gasket or crack exhaust man.

Honda fit 2008 replace 02 sensors still the same code come up what is wrong the cat is new 02 new

Next step is to check for exhaust or intake leaks, either one can also cause the code. Also, if possible, clean the Mass Air Flow (MAF) sensor and replaced the air filter.

My car is a 2001 and it has the check engine light on the code is p0172 and it says the is the EGR it's that right sure l change it

The Check Engine Light Went On As Soon As I Instlled A Throttle Body Spacet & It's Still On. I Tuck It To Autozone & The Code Came Up As (Faulty Mass Air Flow Sensor) Fual Burning To Rich. Whar Should I Do?

What model and year is your Honda? You may have to replace the Mass Air Flow sensor.

honda accord 1999 the catalytic was removed does the code 420 . will this stil appear. in check engine status.

Yes. If there is no catalytic converter the P0420 code will set.

Will a bad PCV valve cause this error code?

Hond vezeel model 2013 this vechicl code P0172 fuel systeam to rich
I check the fuel pressure is
Then i check oxygen sensor both is ok and CAT and EGR service and teppet adjust
The does not remove still apear

It might be possible, but it's very unlikely.

I have a 2009 Honda Accord P0172 error code. I have checked the catalytic converter, exhaust, fuel filter and the plugs. Still the check engine light keeps coming on.

Did you just checked or replaced the spark plugs? The spark plugs are probably one of the most common problems for the P0172 code. Also when was the last time you adjust the valves?

2004 Civic same problem

If you get the P0172 code it means that there is more fuel in the combustion than the Engine Control Module (ECM) is expecting. Common problems are leaking fuel injectors, faulty Mass Air Flow (MAF) sensor or valve adjustment, and in some cases bad spark plugs. You could start by cleaning the MAF and perform a valve adjustment, which is part of the regular maintenance.

What would cause gas to back up into my air intake all the way to my air filter case. on honda crv 2003. I have codes po172 and po420. I have replaced both 02 sensors and map sensor. I have fixed all my vac leaks and cleaned the throttle body

Fuel injector leaks. One or more of the injectors failed and is dumping fuel in the engine. That's probably causing the catalytic converter to fail and set the P0420 code. I recommend fixing the problem as soon as possible before it damage the catalytic converter.

I have honda city 2007 model code p0172
Engine miss fire<

Unfortunately, there are several thing that could set the P0172 code. You could start by changing the spark plugs and cleaning the MAF.

Do I need to adjust the valves on 2001 Accord??

Yes, every 100,000 miles or when the valves make noise.

I have a P0172 Code in my 04 accord (2.4L manual). It just turned 200,000 miles so I replaced the spark plugs. The intake boot was badly torn in a couple of spots so I replaced that and thought that might fix it. The air filter is clean. The car seems to have lost a lot of power, I can be in third gear or higher and with the accelerator floored I can barely increase my speed up the slightest incline. Freeze frame data for the engine light: 64 mph, MAP 23 inHg, RPM 2552, Short Term Fuel -19.5%, Longer Term Fuel -18.7%, engine coolant 194 deg F. Any help is appreciated

Other than the spark plugs and intake boot, the only thing I have seen setting the P0172 code and some hesitation during acceleration is the front Oxygen Sensor. Before you replace the O2 sensor, make sure the throttle body is clean.

I have A 2006 Honda Accord with a p0172 & p0175 code. I changed the sensor's for p0172 code, pvc ,
did a valve lash , plugs and coil packs, checked the air intake boot changed the air filter did the timing belt and water pump. ran cat clean. and yet the code stays on. out of Idea's

I changed the sensor's for p0172 code

What sensor did you replaced? For your model and year, when you have both codes, the P0172 and P0175, the most likely cause of the problem is the Manifold Absolute Pressure (MAP) Sensor

2017 Honda Civic EX Hatch. Getting P0172 along with P219C (no. 1 cylinder air-fuel ratio variation) and P0303 and P0304 (misfires on no. 3 and 4 cylinders). And idea what this combo could be caused by?

The Mass Air Flow (MAF) is one of the probable causes. There is a factory service bulletin for the P0172, P0303 and P0304, which recommends reprogramming the PCM to fix the problem. The bulletin does not mention the P219C. Start by checking the MAF and air filter. If the MAF and air filter are clean, then I recommend reprogramming the PCM at the dealer.

Thx for input. I am noticing some physical symptoms as well (rough idling and car’s fuel economy indicator is showing poor MPG). Dealership initially diagnosed potential blown head gasket or cracked cylinder head, but there are no physical symptoms of this (oil is fine not milky, coolant is not bubbly after driving, and all valves passed compression test). Independent mechanic says they think it is fuel injectors. Could these codes signal fault fuel injection system?

Also heard that unplugging the MAF sensor while the car is running is a good way to check. Is that true?

I never heard of that.

It's possible, it could be that the fuel injectors are just clogged. Try running some fuel injector cleaner and use high octane gas for a couple of weeks to see if that makes any difference.

Sounds good. Thanks for the info and your assistance!

I have a honda pilot 2003 po172 code for rich fuel trim keeps coming on. Spark plugs, coils, And valves are good. Replaced air filter, egr valve, both 02 sensors, map sensor, throttle body mass air flow sensor, and used a fuel cleaner. Light keeps coming on with the same code, any ideas?

Diagnosing the P0172 code can sometimes be difficult. The Oxygen sensor and spark plugs are by far the most frequent problem, but your next step is to check for intake leaks. Try to find a damaged hose or the intake manifold gasket.

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