Diagnosis
Generic codes and the faults another shop has already given up on. We stayed on a MAF code that nobody else could pin down until it was found and fixed.
Diesel repair · Show Low, Arizona
Diesel repair for Powerstroke, Cummins and Duramax
Limp mode, dash codes, engine, transmission and exhaust. Tell us what the truck is doing and we will find the fault before anyone talks about parts. You get the price before we start.
Call (928) 537-3207Start here
What is it actually doing?
Nobody rings a shop asking for "diagnostics". They ring because the truck is doing something it did not do last week. Find yours below.
It dropped into limp modePower cut, speed capped, usually an emissions or sensor fault behind it. Common, and very often not the expensive thing you are afraid of.Get it looked at
Check engine light is onA code is a starting point, not an answer. We read it properly rather than replacing parts until the light goes out.Get it looked at
It will not startFuel, air, charging or something mechanical. Tell us whether it cranks, and whether it did anything odd the day before.Get it looked at
It is running hotOil coolers, coolant and the long climbs around here that find every weak point. Worth stopping for before it costs an engine.Get it looked at
Something is leakingTransmission, coolant or oil. A leak is cheap to fix and expensive to ignore, and we have caught a Duramax Allison leak before it became a rebuild.Get it looked at
I've been quoted something scaryRead us the quote. If it is fair we will say so. If it is for parts you do not need, we will say that too.Get a second opinion
The work itself
What we fix
Named jobs on named platforms, because a list of categories tells you nothing about whether a shop has done yours before.
Call (928) 537-3207Engine
Oil coolers, turbos, head gaskets and internal work across Powerstroke, Cummins and Duramax.
DEF, DPF and EGR
Emissions faults, regen problems and the derates that come with them. Diagnosed and repaired properly, with the options in front of you first.
Transmission
Allison and other heavy automatics. Leaks, service and repair on trucks that tow for a living.
Exhaust and performance
Custom exhaust, intakes and top of the line parts fitted without cutting corners. People drive up from the Valley for this rather than have it done down there.
Regular service
Scheduled work on diesel and gas, including fitting parts you have supplied yourself.
In their own words
Jobs like yours, in their own words
“My truck kept throwing a generic MAF code. They went way above and beyond to diagnose and fix the issue when no one else could. Fair price. Very friendly. Highly recommend.”
“Amazing shop! They are fast! Took my truck in both times had it back within the next day! Very honest and respectful! I would 100% recommend!”
“PHD - Got me right in for service and fixed a transmission leak on my Duramax - Allison Transmission. Great customer service and I learned about all the services they offer, and I am scheduling some body work with them. Would highly recommend them for diesel and general automotive repair and service work!!!”
“Powerhouse Diesel is a great shop. We were in AZ/NM for work and we blew a turbo. They understood our need to get our fire engine back up and running and exceeded our expectations. They got us fixed up and back on the road without issues in less than 3 days when the local dealership said they wouldn't even look at it for another 10 days. Thank you for standing by your word, your hard work, professionalism, and fair pricing. I strongly recommend this shop!”
Before you hand over the keys
Four things we commit to in writing
No work without a yes
You get the number before anything is ordered or started. If we open it up and find more, you hear about it before we touch it.
Diagnosis, not guesswork
We find the actual fault before anyone talks about parts. Replacing parts until it stops is how a bill triples.
An honest timeframe
A real answer, not an optimistic one. If parts or the job move the date, you hear it from us, not at pickup.
We say when to walk away
If a repair is not worth what the vehicle is worth, we will tell you that instead of taking the money.
Questions
What drivers ask
If the truck is undrivable, call. The form is fine for booking and second opinions.
(928) 537-3207What does limp mode or a derate actually mean?
The engine has protected itself by cutting power, usually because of an emissions or sensor fault. It is a symptom, not a diagnosis. The fix depends entirely on what triggered it, which is why we read it properly before anyone talks about parts.
Another shop quoted me thousands. Is a second opinion worth it?
Almost always. We have had people turn up with dealer quotes for thousands in parts that were not needed at all. Read us the quote over the phone and you will get a straight answer, including when the quote turns out to be a fair one.
Do you work on Powerstroke, Cummins and Duramax?
All three, every week, plus Allison transmissions. If your platform is outside what we do we will tell you rather than learn on your truck.
My check engine light is on but it drives fine. Does it matter?
Sometimes it is minor and sometimes it is the first warning before an expensive failure. A code read costs a lot less than finding out the hard way.
Can you fit parts I have already bought?
Yes. We have fitted customer supplied parts and told the owner exactly what was done. Tell us what you have when you call.
Do you do performance work as well as repair?
Yes. Custom exhaust, intakes and quality parts fitted properly. One customer drove up from North Peoria for a 6.7 Cummins build rather than have it done in the Valley.
Tell us what it is doing
Call during opening hours, or send the form and we will call you back. Monday to Thursday 8 to 5, Friday 8 to 4.