Welcome to JustAnswer.com! My name is DriveFast71(Ron) and I will do my best to answer all of your questions completely and accurately.
Can you give me the actual "p-code" that was retrieved? (Usually just to the left of the description on the AutoZone print-out)
Ok- the P0178 is actually becoming a very common GM problem with the FlexFuel system. Most commonly, this is going to be a faulty Fuel Composition Sensor (aka Flex Fuel Sensor) but make sure you check the wire harness and connector for any loose, broken or rubbed through wires, first. If the visual inspection checks ok, then more than likely, the sensor will need to be replaced. It's located on the driver's side frame rail, front.
Can't I just bypass this this? I've used both E85 and unleaded regular and franyly, I am dissapointd with E85's mileage. So I haven't used it in a while. There a non oem device on the market. I think I would rather do this anyway and then just not use E85 anymore and especially since there is only one station within a 50 mile radius that carries this shit.
Hre is the unit I'm considering getting:
You'll have to cut and past this into you web browser.
So, are you saying, don't do it? I can probably find a standard unit but then there's to two hour install time and the tinyb bit of fuel that spills out. There is another unit that does the same thing. I'll look into it.
To be perfectly honest with you- I have very little experience with these by-pass units, and can only tell you what i've dealt with in other customers. I'm here in Rhode Island, and aside from California, I think we've got THE most anal DMV in the country. We MUST do everything "by the book" here. No by-passes at all! I'd lose my Inspector's License if i got caught installing a "by-pass" and then putting a sticker on that car.
That I do not understand. All the emission systems are still there. It's just that someone elects to go with one type of fuel over another. If the sensor tell the systems that it's using unleaded fuel instead of E85, what's the problem here?
There is no problem with it by the view of the vehicle's on-board computer... the problem is with RI DMV. They don't allow units like this. I mean, in all honesty, what they don't know won't hurt them, and as long as the Check Engine Light is not on- it's no big deal. Just at my garage, we don't take the chance.