AKA & K ServiceStamford, CT
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DiagnosticsFebruary 10, 2026 · 4 min read

Why Your Check Engine Light Comes On in a Stamford Winter

Cold mornings on the Merritt do a number on sensors, batteries, and seals. Here is what that little amber light usually means before you bring it in.

A check engine light in January is almost a tradition in Stamford. The temperature swings between a cold garage overnight and a warmed-up engine put stress on parts that were already on their way out. The light is your car asking for a diagnosis, not a verdict.

The usual winter suspects

  • A loose or failing gas cap — the cheapest fix, and the most common.
  • An oxygen sensor reading off because cold air changes the fuel mix.
  • A battery and alternator struggling in the cold, dropping voltage to the computer.
  • A small vacuum leak from a rubber hose that hardened overnight.

None of those mean your engine is about to fail. But a sensor left unfixed for weeks can burn more fuel and damage the catalytic converter, which turns a $40 part into a $400 one.

Steady vs. flashing

A steady light means get it diagnosed soon. A flashing light means a misfire is dumping raw fuel into the exhaust, and you should pull over and call the shop before you drive another mile.

At A & K Service on Newfield Avenue we read the code, tell you what it actually means, and let you decide. No mystery estimate, no pressure to replace parts that still have life in them. Call (203) 324-3723 and we will get the car on the lift.

Bring the car to A & K Service

524 Newfield Ave, Stamford, CT. Open Mon–Fri 8–6 and Sat 7–7.

Bring it to A & K. Get a straight answer.

Call the shop and talk to the people who turn the wrenches. No service writer, no upsell script.

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