Illustration: a lit check engine light on a dark dashboard
CHECK ENGINE LIGHT · SAUGUS, MA
If your check engine light is on, V-Tech Auto Services in Saugus, MA will find out why. Our team reads the code, tests what it points to, and explains the cause in plain words before any repair, on foreign and domestic cars for drivers in Saugus and the North Shore.
Open Monday–Friday, 8:00 AM–5:00 PM · Closed weekends
Our shop in SaugusReal photos, further down
Check engine light flashing? Go easy and call us.
Illustration: a wet road at night, from the driver's seat
The check engine light is the yellow or orange engine-shaped symbol on your dashboard. When it stays on, your car's computer has noticed a problem and saved a fault code: a short code, like P0301, that names the system involved. Every car sold in the U.S. since the 1996 model year has this self-check system, called OBD-II.
The light looks the same for a loose gas cap as it does for an engine misfire. The only way to know which one you have is to find out what's behind it. (It also lights up for a second or two when you start the car. That's a bulb check, and it's normal.)
A code reader shows which code is stored, and that's a useful start. But a code tells you where the computer noticed a problem. It doesn't always tell you what caused it. Two common examples:
Replace the wrong part and you've paid for it and you still have the light. Testing is what turns "the code says" into "this is what failed."
At our Saugus shop, it goes like this:
We sort what we find into three groups, so you know where you stand:
A misfire, overheating, or anything that changes how the car drives or stops.
A fault that will get worse or burn more fuel if it's left, like a failing sensor.
Something minor that isn't hurting the engine, which you can plan around.
You'll also hear what it isn't. For a lot of people, that's the biggest relief of all.
… I’ve had incredible experiences from check engine lights, brakes, tires and general repair. I highly recommend this business.
… He showed me all the work he was going to complete and everything after he completed it. …
If it's steady and the car drives normally, usually yes, for a short while. Get it checked soon so a small fault doesn't grow. If it's flashing, ease off and call us, because that usually means a misfire that can damage the catalytic converter. If a red oil or temperature light comes on too, pull over safely and shut the engine off.
Usually a serious misfire: one or more cylinders isn't burning its fuel properly. The unburned fuel goes into the exhaust and can overheat the catalytic converter. Drive gently, avoid hard acceleration, and call us as soon as you can.
Clearing a code turns the light off. It doesn't fix the fault. If the problem is still there, the computer sees it again and turns the light back on, sometimes the same day, sometimes after a few drives. Finding and fixing the cause is the only way to keep it off.
It depends on the car and what the problem turns out to be, so we don't post a number here. Call and ask. We'll tell you what's involved before we start, and nothing gets repaired until you've heard what's wrong and decided.
It tells you which code is stored, which is a helpful first step. But a code points to a system, not always to the part that failed, and the same code can have several causes. Testing is what tells you which part it is, so you don't pay for one you didn't need.
Yes, though it usually isn't urgent. Many faults, like a small vapor leak or a sensor starting to fail, don't change how the car feels at first. Some get worse or cost you fuel if they're left alone. And while the light is already on for one fault, it can't warn you about a new one.
The shop is at 24 Winter St in Saugus. Our service area is Saugus and the nearby North Shore towns below.
Real photos of our shop in Saugus, taken by drone.
Tell us whether the light is steady or flashing and what the car is doing, and we'll tell you how soon to bring it in.
Closed right now? Send us a message, and call us Monday–Friday, 8 AM–5 PM.
