Precision Diagnostics

Engine Diagnostics & Check Engine Light

That glowing check engine light? We'll find exactly what's wrong - not just read the code. Advanced diagnostics, honest answers, no guesswork.

A check engine light can mean anything from a loose gas cap to a serious engine problem. At Brunswick Auto Service in Moncton, we use professional-grade diagnostic equipment to pinpoint the root cause and explain your options.

What We Diagnose

Check Engine Light Diagnosis

Full OBD2 scan plus live data analysis. We read both OEM and generic codes and trace the real cause.

Battery & Charging System

Battery load test, alternator output check, starter current draw. Dead battery or failing alternator?

O2 Sensor & Emissions Testing

Faulty oxygen sensors, catalytic converter efficiency, EVAP system leaks.

Ignition System

Spark plugs, coils, wires, and timing. Misfires, rough idle, hard starting.

EVAP System Diagnosis

Evaporative emissions system testing — P0456 codes, purge valve checks, and gas cap diagnostics.

Computer & Module Testing

ECU communication faults, module resets, reprogramming where supported.

Common Check Engine Light Causes

Oxygen Sensor Failure

The most common CEL trigger. Usually $200-$400 to replace.

Loose or Damaged Gas Cap

Believe it or not, this triggers many CEL codes.

Catalytic Converter Issues

A failing converter triggers a P0420 code. We verify before recommending replacement.

Mass Airflow Sensor Dirty

A dirty MAF sensor causes rough running and poor fuel economy.

Spark Plug or Coil Failure

Misfire codes (P0300-P0308) point to ignition problems.

FAQ

Frequently Asked Questions

Quick answers about our engine diagnostics moncton services.

How much does diagnostic service cost?

Our standard diagnostic fee is $110, but may be less if the diagnosis is straightforward.

Is it safe to drive with the check engine light on?

If it's solid (not flashing), you can usually drive to the shop. A flashing light means a severe misfire - stop driving.

Do you work on European cars too?

Yes - we diagnose BMW, Mercedes, VW, Audi, and other European vehicles.

Our Services

More Auto Services in Moncton

Explore all the services we offer at Brunswick Auto Service.

Need Engine Diagnostics & Check Engine Light in Moncton?

Book online or call. We'll treat you fair.

37 Lewisville Road, Moncton, NB