Auto Diagnostics in Graham, WA

Auto Diagnostics

Most people call us for one of three reasons: a warning light came on and won't go off, the car won't start, or something is acting up but only some of the time. That last one is the hardest to deal with, and it's the one that sends people from shop to shop getting parts thrown at the problem without much changing.

A check engine light usually means the computer has flagged something outside its normal range - a sensor reading, a misfire, a fuel trim that's off. It does not tell you which part to replace. It tells you where to start looking. We read the codes, then check whether the code actually matches what the car is doing. Sometimes it does. Sometimes the real problem is upstream of what the code is pointing at, and replacing the flagged part fixes nothing.

No-starts split a few ways: the engine cranks but won't fire, the engine doesn't crank at all, or it cranks slow. Each points somewhere different - fuel delivery, ignition, a dead battery, a starter, a bad ground. We work through it in that order rather than guessing.

Intermittent faults - stalls that happen once a week, a light that flickers on for a mile and disappears - take longer, because the fault has to be caught doing it, or we have to reconstruct what conditions it needs. Nick Porter does most of our driveability and diagnostic work, and on these he'll often want to know when it happens: cold mornings, highway speed, after rain. That detail matters more than people think.

What it costs depends entirely on how long it takes to find the fault, which we can't always know up front. Some issues are a fifteen-minute check. Others take longer because the car has to be driven or the fault has to reappear. We'll tell you what we're doing and why before we start running up time on it.

On an older car, sometimes the honest answer is that chasing an intermittent electrical fault will cost more than the car is worth fixing it on. We'll say that if it's true, rather than keep billing hours on it.

We're at 28801 Meridian E in Graham, open Monday through Saturday. If the light's on right now and you want to know what it actually means before spending anything, call (253) 375-7057.

Questions about auto diagnostics

Is it safe to keep driving with the check engine light on?

Usually yes for a day or two, but it depends on whether the light is steady or flashing. A flashing light means the engine is misfiring badly enough to damage the catalytic converter, so stop driving and get it looked at. A steady light is worth checking soon, but it's not usually an emergency.

Can you just read the code and tell me what part to buy?

We can pull the code over the counter, but the code by itself often isn't enough to know what to replace. It points at a system, not always the exact part, so we still need to check whether the code matches what the car is actually doing before we'd tell someone to buy anything.

What if the fault doesn't happen while it's at your shop?

This is the hard part of intermittent problems. Sometimes we can reproduce it on a test drive, sometimes we can't, and then we're working from what you tell us about when it happens - cold mornings, highway speed, after rain. If we can't catch it acting up, we'll say so rather than guess and charge for a repair that might not fix it.

Does the diagnostic charge get taken off the repair if you do the work?

That depends on the job and we'd rather tell you specifically at the time than promise a rule that doesn't hold for every case. Ask Brianna when you bring it in and she'll tell you how it works for your particular repair.

Will you just clear the code so the light turns off?

We can, but if the underlying problem is still there the light will come back on, sometimes in a day, sometimes in a few weeks. We'd rather find out what triggered it first, so clearing it is usually the last step, not the first.

Where our customers come from

We are on Meridian E in Graham, and people bring us auto diagnostics from across the South Puget Sound. If your town is on this list, we are probably closer than you think.