Comments on: P0172 Code (Symptoms, Causes, and How to Fix)

By: Sean

Sean — Thu, 19 May 2022 16:00:00 +0000

In reply to Sara.

Is this an issue that has only occurred once? You could probably stand to wait to see if the light comes back on. If it were me, I would start trying to fix the problem (even if the dealer can’t replicate it). Then again, I am comfortable doing some diagnostics to help me better understand what triggered the light.

What is the year, make, model, and mileage on the vehicle? If there are any outstanding maintenance items that haven’t been taken care of in a while (like spark plugs), it might be a good time to think about doing those. If your vehicle has a MAF sensor, perhaps it needs to be cleaned. These are just some ideas to get started though, and your mileage may vary.

By: Sara

Sara — Wed, 18 May 2022 13:12:58 +0000

My check engine light came, code p0172. Stayed on for most of the day. Last trip of the day it was off and hasn’t come back on. Should I be concerned? The dealership won’t look at it if the light isn’t on.

By: Sean

Sean — Thu, 14 Apr 2022 16:22:03 +0000

In reply to Diana. Could be an air restriction, a leaky injector, a vacuum leak, a dirty MAP sensor, or a dirty MAF sensor. It could be caused by pretty much anything that throws the air fuel ratio off to make the vehicle run excessively rich. I am guessing the P0430 is caused by whatever is causing the P0172. I wouldn't immediately assume it the catalytic converter has anything to do with this problem.

By: Diana

Diana — Mon, 11 Apr 2022 20:38:59 +0000

Have 06 Honda Pilot that has codes p0172 and p0430 but we replaced all Oxygen sensors and replace the cat on the bottom and the cat in the front of the engine what else could possibly be throwing these codes

By: Sean

Sean — Thu, 03 Mar 2022 17:25:12 +0000

In reply to MarkAnderson. That is quite the parts cannon list. Were all those components replaced in an attempt to fix the rich bank 1 code, or are they addressing separate issues?

By: MarkAnderson

MarkAnderson — Wed, 02 Mar 2022 13:46:33 +0000

I have a 2002 dodge ram 5.9 magnum has to rich bank 1 code I have replaced Distributor crank sensor New fuel pumpTwo new O2 sensorsMap sensor throttle positioning sensorAir filterSpark plugs wiresI’m doing with the cooling systemAnd I have fix some leakyRubber hosesBut everything I do the code stil comes backDid the plenum gasketDidDid the plenum gasket in new fuel injections

By: Joshua Williams

Joshua Williams — Sun, 23 Jan 2022 14:42:55 +0000

So my 2005 f150 had p0172 and p0175 and loss of power when it’s hot outside but when it’s cold I have no symptoms I almost think it’s because I put a autozone maf sensor I am going to try to get a motor craft one and see if that helps

By: Patric

Patric — Fri, 19 Nov 2021 14:40:41 +0000

Mines doing the exact same thing and I’ve done a tune up oil change cleaned the gas tank bought a new fuel pump and fuel filter and it is still doing the same thing. I’ve also replaced the air filter

By: Matthew Paul Chibambo

Matthew Paul Chibambo — Mon, 05 Jul 2021 15:34:09 +0000

Well explained .

By: Sean

Sean — Mon, 10 May 2021 19:22:16 +0000

In reply to Laura. At first glance I would think those are two separate issues, but I'm not sure. What year, make, and model is your vehicle? I suspect the egg smell is a result of the car running rich.