3412 S Minnesota Ave, Sioux FallsMon to Fri, 8 to 5
Call (605) 339-9717
T&A Auto Service Request an Estimate
A diagnostic laptop listing trouble codes on the cart, with the vehicle under its hood behind it at T&A Auto Service
Check engine and diagnostics

Answers for everylight on the dash

Check engine, ABS, traction and every other light on the dash. We read the codes, test what set them, and call you with the answer and the price before anything is touched.

Same dayMost estimates

Drop it off in the morning and you will hear from us before we close.

1 yearWorkmanship warranty

Twelve months on the labour, with parts carrying their own coverage.

ASECertified technicians

The people testing your vehicle hold current ASE certifications.

What it is

What a diagnosisactually covers

The light points at a system rather than a single part, so we test the whole circuit before quoting any of it.

Reading the codes

Stored codes and freeze frame data show what the computer saw at the moment the light came on.

Testing the cause

Sensors, wiring, fuel trims and vacuum readings confirm which part actually set the code.

Every warning light

Check engine, ABS, traction, battery and airbag lights all get the same process: read, test, answer.

Worth a look

Dash lights worthbringing in

  • 01A check engine light that is on and steady
  • 02A flashing light, which wants looking at right away
  • 03Rough running, hesitation or fuel mileage that has changed
  • 04ABS, traction or battery lights showing alongside it
A dash cluster with the check engine, ABS, battery and traction lights on, seen from the driver's seat at T&A Auto Service
Inside the T&A Auto Service shop
★★★★★
Their customer service and workexceeded our trust and expectations!
Frank Regas  ·  Google review
Always been treated witha smile and respect.
Preston Seten  ·  Google review
We found a new homewith T&A Service.
Cynthia Lambert  ·  Google review
Great serviceand great people.
Kim Kapplinger  ·  Google review
This is where I will be takingall my vehicles from now on
John Avery  ·  Google review
So I took the hose to T and Aand they rebuilt it in 1 day.
Gordon Ness  ·  Google review
They were happy to helpand charged me nothing.
Carol Stinger  ·  Google review
Truly people who care aboutrepairing your vehicle.
Mark  ·  Google review
A scan tablet showing diagnostic trouble codes on the bench, with the vehicle waiting behind it
How it works

How we rundiagnostics

01

The scan

We pull the codes and the freeze frame data, then note what the vehicle was doing when the light set.

02

The testing

We test the sensor, circuit or system behind the code until the cause is confirmed.

03

The call

You get what set the light, what it means for driving it, and the price to put it right before we start.

Included

With everydiagnosis

  • The codes and readings, explained in plain language
  • A straight answer on how the vehicle stands to drive
  • The repair price given before any work begins
  • A one-year warranty on our workmanship
Request an estimate →
A diagnostic report, pre-repair estimate and keys laid out on the bench at T&A Auto Service
Request an estimate

Tell us what it's doing

You do not need to know the name of the part. Describe the noise, the feeling or the light, and we will take it from there. Most estimates go out the same business day.

If you would rather talk it through, call (605) 339-9717 and describe what it is doing.

We answer Monday through Friday during shop hours, and we will only use your details to get back to you about your vehicle.

Before you come in

Questions we get about the check engine light

A steady light with the vehicle running normally usually gives you time to plan the visit. A flashing light means a misfire that can damage the catalytic converter, so that one wants looking at right away. Call us, tell us which you have, and we will tell you where you stand.

Worth it. The code stays stored after the light goes out, so we can still read what happened and tell you whether it was a one-off or the start of a pattern.

The code names the system that saw the fault, and the testing names the part. We test the sensor, wiring and readings behind the code first, so the repair you pay for is the one the vehicle needs.

It depends on how deep the fault sits, which is why we quote the diagnostic time up front and call with the repair price before starting. Ask us and we will give you a range over the phone.

Related

Often paired with engine diagnostics

Not sure yet

A new lighton the dash?

Bring it in and we will read it, tell you what set it, and give you the price to put it right. No obligation either way.

Call (605) 339-9717
Fastest wayCall the shop
Any time, day or nightRequest an estimate
A T&A technician running diagnostics under the hood
Brake inspection on the lift
Mounting a tire on the balancer
Suspension work from underneath
Fitting a trailer hitch and wiring