Should I pay a shop twice if they didn't fix my problem?

Thats one reason I bought a OBD2 diagnositc reader for my personal vehicle.

Every time that check engine light went on its 50 dollar fee to hook big shop computer on to it. Learn that the code is insignificant. 50 50 50 50 50 50 50 ugh.

Now I read and delete codes that have no relevance.

What I do plan on having the shop work on next is going to cost me a bunch of $50's I just cannot win.

Regarding emission trucks, they are just too much trouble to be worth it. But Uncle Sam requires it so bottoms up.

 

1. Which doser valve failed? There's two of them, a DEF doser and the 7th injector (diesel doser)...
2. How did they know it was a doser valve?
3. What code did the engine show?
4. Did you get the defective doser valve in hand and get a visual/verbal explanation on why it failed?

If you didn't check those boxes before you left the shop and you go back to get it fixed again, at that shop or another shop, you'll basically be doing the equivalent to a rain dance at that point, just throwing money at something you don't understand (and in all likelihood something they also don't understand). If they give you the cold shoulder for asking questions, don't do any more business there.

A mechanic should treat their occupation like a therapist/psychologist/psychiatrist, their goal being to fix you up right and give you the understanding necessary to keep you OUT of their bay and rolling...not watching TV in their lounge while their hourly shop rate clock is ticking, hoping you actually get a mechanic who gives af about what he does.

 

The part itself might not but the ecm needs to be recalibrated...the ecm reads the sensor inputs from everything and makes adjustments, if you replace a weak link and don't tell the ecm you replaced it, ecm had gotten used to pushing a certain amount through a clogged pipe, you clean the pipe, ecm doesn't know and goes the push as hard as before...ecm is like WTF and starts adjusting other stuff where it shouldn't...ecm doesn't know what changed if you don't give it the chance to recalibrate itself when you make a change somewhere. That's my toddler tech level understanding of it...

 

I wouldn't want anyone but the manufacturer to mess with any of the tune settings, they're the ones who spend billions on R&D to create the thing...

 

Quoting this gold so it never disappears...

 

Let me explain it this way. Many work repairs on a truck don’t require calibration. I’ve done so much work on my truck (probably over 40 items) and not one has required any sort of calibration. It’s even possible that most truck repairs will not require calibration. Again, it’s just my personal experience. I am aware that DPF filters and injectors will require calibration.

 

Glad to hear that. Got to speak up, so many don’t, and just get burned. Hope they get it right.

 

So whatever happened???

Obviously the truck is now fixed as the OP is trucking and has forgotten all about his new TTR pals.

 

I think the biggest problem is lack of understanding among the Industry. The systems were pushed out,under mandate. It took About 10 yrs for the engineers to study and fix problems. Finally figuring out, the pitfalls and getting them fine tuned, A lot of Mechanics just obviously don’t understand the systems. Manufacturers turn a blind eye to faults. A proper diagnosis is the main thing. It may cost more at a good shop, but saves money in the end. Any Idiot can replace everything, that’s what seems to be the case. Wether all at once, or one at a time. A/C is that way, always $1000, well $2000 these days. That’s the cost of changing everything with labor. That’s why. An OP could change all parts himself, and have a better chance at fixing it, than at a Shop that hasn’t a clue. Pay the Pros, Like Dave said, if needed. Cheaper in the end.