Question about 1999 Plymouth Neon

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The codes that came up are P0172 too rich bank one. What does this mean?

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P0172 means air-fuel ratio too rich, malfunction. How it works will take to long but what you have is a problem with either the fuel system or the ignition system. Without a scan-tool to view codes, live data, and run tests. It will take longer. You can look the engine over, see if there are broken vacuum lines, a need for a tune-up, damage to some part of the exhaust system. I wish I had more to say but it could be anything. You know you could have a stuck EGR valve. Hard to say, good-luck.

Posted on May 15, 2010


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I need to know what code means 0172 and how much it cost

P0172 is "system too rich Bank 1"
There are many things that can cause this. The vehicle should be taken to a capable shop and be diagnosed and give you an estimate for repair.
P0172 System Too Rich Bank 1

Oct 13, 2015 | Cars & Trucks

1 Answer

P0172 code. Check Engine light on. Vehicle will not start now

What make and model car ? P0172 OBD II Trouble Code could be running so rich that it fouled the sparks . Pull out the spark plugs and see if there are wet with fuel and black, means that they are fouled out. Have to be cleaned or replaced . I don't know the make of vehicle , so I can only give approximation what mite have caused this , a fuel pressure regulator with a ruptured diaphragm leaking fuel into the intake manifold, leaking fuel injectors P0172 System Too Rich Bank 1

Dec 20, 2014 | Cars & Trucks

1 Answer

P0172 code is present

Hi,P0172 means System Too Rich. Diagnostic Trouble Code Table hope can help you,have a nice day.

Mar 12, 2014 | Dodge Cars & Trucks

1 Answer

1996 Buick Park Avenue OBD code P0172 any ideas

Not sure what you are saying, but code P0172 is for rich fuel mixture bank one. The O2 sensor on bank one is telling the computer the mixture is too rich and the computer can not cut the injectors back enough to make the mixture lean.

Dec 11, 2012 | 1996 Chevrolet K1500

1 Answer

Failed emmisions test . codes P0172 and P1336 for 1999 Saturn SL2

The P0172 means "System too Rich Bank 2 and the P1336 means "Crank/Cam Sensor B Circuit Malfunction"

Jul 27, 2012 | 1999 Saturn SL

1 Answer

I have 3 codes. P0172, p0316 and p0316. It is misfiring under 1000 rpm. after 1000 rpm it runs great

p0172 Basically this means that an oxygen sensor in bank 1 detected a rich condition

p0316 crankshaft position sensor

clean your intake and check you cap / rotor

Dec 24, 2010 | Ford Taurus Cars & Trucks

1 Answer

Speedometer sudenly stoppped working. now works intermittently. also shows check engine light. It is showing p0171 & p0172 codes. Lean and rich. seams like they contradict each other. occasionaly the...

P0171 indicates a lean condition. The most common cause of this is a defective mass air flow sensor. Also check if any vacuum leaks.Replace MAf sensor,if cleaning the MAF does not help.
OBD II P0172 Fuel System Too Rich (Bank 1).P0172 - System Too Rich (Bank 1) Essentially this DTC means that an oxygen sensor in bank 1 detected a rich condition.
When the code says that the Fuel System is "too rich," it means that the computer has been subtracting more and more fuel, which is called Long Term Fuel Trim. Ideally, the Long Term Fuel Trim should be close to 1 to 2 percent. When a code P0172 is set, it means that the Fuel Trim is anywhere from -15 percent to as low as -30 percent compensated. When this happens, the computer knows that there is an improper condition in the control of the Fuel System.


Feb 07, 2010 | 1996 Volvo 850

1 Answer

1996 chevy truck 5.7L has codes P0172, P0172 were

p0172 is--system to rich ( bank 1). an oxygen sensor on bank 1, detected a rich condition ( to little oxygen in exhaust ) v6-v8 - v10 engines, bank 1 is the side of the engine that has # 1 cylinder. causes could be a vacuum leak in a hose, a dirty or bad maf sensor, or fuel pressure or delivery problems.

Oct 29, 2009 | 1996 Chevrolet K1500

4 Answers

Check Engine light is on my 1997 F150 with a small V-8. The tester returns codes P0171, P0172, P0174 and P0175. What does all this mean?

those codes are for lean engine condition look for vac leaks at the back of engine to the pcv valve could hear hissing noise with engine running also check egr valve to be stuck open also when was last fuel filter changed? hope this helps .

Sep 16, 2009 | 1997 Ford F150 Regular Cab

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