Check Engine Light (CEL)

Check Engine Light (CEL)

Your Check Engine Light (CEL) warns you that your vehicle’s computer detected a malfunctioning component in your vehicle which is causing excessive emissions pollution. You may see “check engine,” “service engine soon,” or “check powertrain.” Or, the light may show an engine picture, perhaps with the word “Check.” To determine the actual problem, we use an electronic scan tool or a diagnostic computer to retrieve Diagnostic Trouble Codes (DTC).

Common Cases of CEL Turning On

Some common issues that turn on the check engine light include:

  • Your gas cap isn’t on tight enough; we suggest checking before calling us.
  • Your engine ingested water somewhere
  • The spark plugs are not functioning correctly
  • Your vehicle is misfiring (this one can destroy your catalytic converter very quickly)
  • Your vehicle is emitting high levels of pollutants
  • Transmission Issues (believe it or not a transmission fault causes the engine light to come on)

In any case, you should bring your vehicle to us, and we can inspect your vehicle, diagnose the problem, and take care of it. Ignoring your engine light can cause serious problems with your car in the long run damaging very expensive components leading to very costly repairs.



Make an Appointment

A check engine light appointment goes pretty fast, so stop by or give us a call. It’s best to catch any issue too early, than too late. Schedule an appointment by clicking the button below.


C.E.L. Video Explanation


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Auto Care Plus, LLC, Auto Repair & Service, Merrimack, NH

13 Locations Throughout NH, ME, & MA:

Manchester, NH

991 Candia Road | Manchester, NH 03109
(603) 232-1521

Merrimack, NH

738 D.W. Highway | Merrimack, NH 03054
(603) 429-1002

Hooksett, NH

1112 Hooksett Rd | Hooksett, NH 03106
(603) 644-7238

South Portland, ME

509 Westbrook St. | South Portland, ME 04106
(207) 773-8560

Wolfeboro, NH

635 Center St. | Wolfeboro, NH 03894
(603) 569-1068

Conway, NH

675 White Mountain Hwy | Conway, NH 03818
(603) 447-3873

Derry, NH

418 Island Pond Rd, Bldg #3 | Derry, NH 03038
(603) 845-3900

Lebanon, NH

258 Mechanic St, Lebanon, NH 03766
(603) 448-1381

Dover, NH

28 Sumner Dr, Dover, NH 03820
(603) 742-8627

Londoneryy, NH

107 Nashua Rd, Londonderry, NH 03053
(603) 404-5120

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