Question about Mercury Cougar

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1996 mercury cougar V8 check engine light is on and reading P0172 system to rich (bank 1) how do i fix this

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You have at least 10 possible causes

MAF Sensor--issues
Fuel System -with several problems
Evap System-problems

For the inexperienced & to save money,
before heading to the repair shop

Clean the MAF Sensor
Check,not replace,the Fuel Pressure regulator/sensor
The O2 Sensor may be contaminated or worn out

Posted on Apr 01, 2011

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Posted on Jan 02, 2017

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Hi. I went to autozone and diagnosed with code p0172 on my 2005 Lexus GX470. I have vsc trac, vsc off, anti skid, and check engine light on. The lights come on for about 100 miles and goes off for same...


You own a high end luxury vehicle as do I, 2005 ES330, the dealership is the best place to get Lexus problems fixed. With my own vehicle, I had a thermostat fault code come up, and like you it would reset itself and come back. The code said it was the thermostat and I queried it with my tyre guy. He also said it is a thermostat code. I said but it isn't overheating. He told me that the computers in Lexus are so clever they are actually looking for the water to reach x degrees in x minutes. He replaced the thermostat, the fault never came back. Anyway back to your P0172 Error code.

https://www.autocodes.com/p0172_lexus.html

Possible causes
Faulty front heated oxygen sensor
Ignition misfiring
Faulty fuel injectors
Exhaust gas leaks
Incorrect fuel pressure
Faulty Mass Air Flow (MAF) sensor

The first thing I would try is that stuff that you add to your fuel to clean the injectors.

Read more: https://www.autocodes.com/p0172_lexus.html

Pull codes P0172/P0175, need help diagnoising - ClubLexus - Lexus ...

https://www.clublexus.com > ... > IS Models > IS - 2nd Gen (2006-2013)Jul 6, 2013 - IS - 2nd Gen (2006-2013) - Pull codes P0172/P0175, need help diagnoising - My check engine light, VSC, and traction light all lit up yesterday. I pulled ... Title: 2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0171,P0172,P0174,P0175; System Too Lean (Bank 1); 2006 MY IS350 [08/2005 - ] DTC System too rich ( Bank 1 & Bank 2 )
26 Aug 2017
P0172 code to rich please help!
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Traction control = code P0172 and P175??
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More results from www.clublexus.com

Dirty Mass Air Flow Sensor P0171, P0172, P0174 Codes - YouTube

? 8:09
https://www.youtube.com/watch?v=LJSx2cDoFn4
Jun 4, 2014 - Uploaded by RomanAutomotive
A common cause for lean condition codes is simply a dirty Mass Air Flow Sensor. Since I have been testing ...

code p0172 on my 2005 Lexus GX470 Google Search

Mar 13, 2018 | Lexus Cars & Trucks

1 Answer

My check engine light is pulling up code P0172 my read out says the problem is in bank one only


P0172 is bank 1 rich. May have a fuel injector stuck open or a bad o2 sensor.

Jul 25, 2015 | Cars & Trucks

1 Answer

What does a digital trouble code P0172 mean?


System Too Rich (Bank 1) What does that mean? Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Note: This DTC is very similar to P0175, and in fact your vehicle may show both codes at the same time. Symptoms You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire. Causes A code P0172 may mean that one or more of the following has happened: The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry. There could be a vacuum leak. There could be a fuel pressure or delivery problem Possible Solutions Possible solutions include: Inspect all vacuum and PCV hoses, replace if necessary Cleanthe MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling Inspect fuel lines for cracks, leaks, or pinches Check the fuel pressure at the fuel rail Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced. Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

Read more at: http://www.obd-codes.com/p0172
Copyright © OBD-Codes.com

May 07, 2015 | 2001 Mercury Villager

1 Answer

P0172 2003 trailblazer


P0172 states that the "bank 1" side of the engine is running too rich.
Here is a link explaining it in more detail and giving possible causes and solutions.


http://www.obd-codes.com/p0172

Apr 14, 2015 | 2003 Chevrolet TrailBlazer

1 Answer

I have got a P0171 & P0174 engine codes on my 2001 mercury sable. What do I do to fix it.


P0171 System Too Lean Bank 1
P0172 System Too Rich Bank 1
P0173 Fuel Trim Bank 2
P0174 System Too Lean Bank 2

OK, that's a partial list of codes, the fuel delivery is controlled by the oxygen sensors, so it's possible that something in that area could be causing your problem.

However, it could also be clogged fuel injectors that can't deliver enough fuel to the cylinders compared to the air that is pulled into the engine.

Try some fuel injector cleaner for that poured into the gas tank.

How does it run?
Does it miss at all?

Oct 08, 2010 | 2001 Mercury Sable

1 Answer

1996 dodge dakota v6 4v4 check engine


I could be wrong but it sounds like you need to put some attention towards the cat and the O2 sensors.

Mar 14, 2010 | 1996 Dodge Dakota

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.


Thanks.

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

1 Answer

Check engine light. got 2 codes P0172 and p0175.


Unclip the 02 harness, then take out the 02 sensor. 5 minute job.

Mar 04, 2009 | 2002 Mercury Sable

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