[2010 Tahoe owner]

I have a 2013 Tahoe that is throwing codes of P0172, 175 and check engine light. It has been tuned up, new throttle body, canister replaced, Map sensor O2 sensor, module by the gas tank programmed and changed and over a thousand dollars later, still the same problem! I am begging for help! Thank you.

 

[RayVoy]

Welcome aboard.

Wish you had come here before you started buying things.

Both codes are fuel mix too rich, one is for bank one, the other for bank two.

Usually a too rich code is an indication that you have a leaking injector. In your case, at least 2 leaking injectors, maybe 8.

And the hard to start indicates the same thing.

I would suggest using an injector cleaner like Seafoam

 

[2010 Tahoe owner]

Welcome aboard.

Wish you had come here before you started buying things.

Both codes are fuel mix too rich, one is for bank one, the other for bank two.

Usually a too rich code is an indication that you have a leaking injector. In your case, at least 2 leaking injectors, maybe 8.

And the hard to start indicates the same thing.

I would suggest using an injector cleaner like Seafoam

 

[2010 Tahoe owner]

Thank you!

 

[2010 Tahoe owner]

Thank you!

Do you think the injectors need replaced or can the be cleaned?

 

[OpalLacod]

Do you think the injectors need replaced or can the be cleaned?

I would attempt cleaning with fuel additives first.

 

[RayVoy]

Do you think the injectors need replaced or can the be cleaned?

I would try cleaning first.

 

[Cowboytrukr]

If that does not fix the problem, and if this truck is not your daily driver, perhaps you might consider sending the injectors to www.witchhunter.com to get them cleaned. They will do an as found flow test, clean them, and then retest. They do great work.

 

[Gold truck]

I have a 2013 Tahoe that is throwing codes of P0172, 175 and check engine light. It has been tuned up, new throttle body, canister replaced, Map sensor O2 sensor, module by the gas tank programmed and changed and over a thousand dollars later, still the same problem! I am begging for help! Thank you.

Here are some of the most common P0172 causes. Dirty/broken mass air flow (MAF) sensor Vacuum leak Fuel delivery or pressure malfunction (High fuel pressure, bad fuel injector) Contaminated/ defective oxygen sensor Bad coolant temperature sensor

 

[bbc]

If that does not fix the problem, and if this truck is not your daily driver, perhaps you might consider sending the injectors to www.witchhunter.com to get them cleaned. They will do an as found flow test, clean them, and then retest. They do great work.

You should note that I have found that some salvage yards DO disassemble engines for parts. One quoted me about 80 bux for 8 injectors for my 2004 tahoe. I was going to but them, test them, and put them in and then send my originals off for cleaning. the problem I find with messing with injectors as I recall was the price of the DAYAM o-rings associated with them...

 

[Gold truck]

You should note that I have found that some salvage yards DO disassemble engines for parts. One quoted me about 80 bux for 8 injectors for my 2004 tahoe. I was going to but them, test them, and put them in and then send my originals off for cleaning. the problem I find with messing with injectors as I recall was the price of the DAYAM o-rings associated with them...

Before new injectors put a quart of Lucas fuel injection cleaner on a full tank and run it.

 

[bbc]

Before new injectors put a quart of Lucas fuel injection cleaner on a full tank and run it.

Man I have put massive doses of everything in with only 5 gals gas in the tank, and ranging to running the lucas injector cleaner long term with every tank. There is something going on with mine where it def bleeds down. But somehow it knows it and it is preventing the first crank attempt from starting.

Hell I read something the other day at a forum about the computers determination of alcohol percentage in fuel can cause this maybe. Its really unclear to me because they make it sound like the fuel pump its self may sense alcohol content, or the O2 sensors are doing so calculation. They talk about an O2 sensor that is no longer used after early 2000 models.

Im not even so sure the alcohol sensor and a physical piece of hardware is not just some sick internet lore incepted for fun no different that the myth of "Turn signal fluid" or whatever ...

But somehow a calculation is made and it can get up over 50% and freak your ECM out and possibly cause this I hear..

i think mine is leaking at the injector rail or the injectors are sticking slightly open. And I am not sure it has not started to damage my engine as it is starting rougher and rougher as time moves on... And i am talking about a piss poor idle for first 5 secs that I have never experienced. Then all seems fine with the exception of poor performance many times short of cold DRY weather is about the only time mine will perform. **** my wifes 2003 was life a damb sports car and mine sucked from day one almost 20 years ago soon.....