Fuel Composition Sensor (P0178) - SOLVED

[OR VietVet]

Flex fuel engine fuel composition sensor, seen a few of these set that code here. Parts cannon dictates replacement because of it being inexpensive and easy to install.

 

[iamdub]

I wish I had such a sensor.

*sigh* One day...

 

[Fless]

Flex fuel engine fuel composition sensor, seen a few of these set that code here. Parts cannon dictates replacement because of it being inexpensive and easy to install.

Inexpensive? On RA they are just under $400 each. OE.

 

[OR VietVet]

Inexpensive? On RA they are just under $400 each. OE.

More Information for GM GENUINE 12570260

I had seen threads about this before but my recollection was that it was not that expensive but $371 is not cheap for sure. Good thing he didn't just throw the part at it first and did the testing to be sure. Sorry @Fless

You also need to remember that I am a "thousandaire".

 

[RAMurphy]

Yep, I laughed at the first post about "not expensive" but then again for some that may be cheap. That is why I checked out the wires first. The original has been on there for over 20 years and all those miles, so if you consider the cost per years or per mile - that damn thing is really cheap.

 

[MassHoe04]

Yep, I laughed at the first post about "not expensive" but then again for some that may be cheap. That is why I checked out the wires first. The original has been on there for over 20 years and all those miles, so if you consider the cost per years or per mile - that damn thing is really cheap.

Yeah... Sorry about that comment about being relatively inexpensive!

I don't have FF. I was curious, so I took a quick peek on the interweb and the first things that popped up were like $100.

But for AC Delco... I guess one and done is not terrible for the $371.

NTK was $13 more. Not sure, but there is a very good chance they could have been the OE supplier to GM and making the AC Delco replacements.
If for some reason anyone is not able to get AC Delco, I would be able to put my trust in an NTK as an alternative replacement.

On the bright side, at least it will be an easy job to do!

 

[RAMurphy]

Yeah... Sorry about that comment about being relatively inexpensive!

I don't have FF. I was curious, so I took a quick peek on the interweb and the first things that popped up were like $100.

But for AC Delco... I guess one and done is not terrible for the $371.

NTK was $13 more. Not sure, but there is a very good chance they could have been the OE supplier to GM and making the AC Delco replacements.
If for some reason anyone is not able to get AC Delco, I would be able to put my trust in an NTK as an alternative replacement.

On the bright side, at least it will be an easy job to do!

No issues or worries here.

 

[RAMurphy]

Tahoe is up and ready for this change. I will do this tomorrow. While I'm under the vehicle and under basically the same location, I will also change out the evap canister.

 

[RAMurphy]

Completed the part change. It took about 30 minutes or so - even after depressurizing the fuel lines I still took a bit of a fuel bath. Pretty easy job even in the confined space.

Old compensator:


New part installed:

 

[Joseph Garcia]

Nice work! Thank you for brining this issue to resolution, and posting the result.