What can cause check engine light to go on?

What can cause check engine light to go on?

What causes the check engine light to come on?

  1. Oxygen sensor (or O2 sensor)
  2. Catalytic converter failure.
  3. Spark plug or ignition coil failure.
  4. Airflow sensor failure.
  5. Replace the thermostat.
  6. Replace exhaust gas recirculation (EGR) valve and clean all EGR ports.

What causes the Check Engine light to come on?

Once you’re at the store, they’ll come out and plug a small computer underneath your dashboard and read back a code stating what happened to the car. According study conducted by CarMD, five common malfunctions cause the check engine light to come on, and several of them are simple to fix yourself. Let’s take a look at the most common issues.

Is it okay to drive with a flashing check engine light?

It’s never recommended to drive with a flashing check engine light. A constant check engine light can be okay to drive with sometimes, but a flashing engine light is most likely a more serious problem that has to be fixed as soon as possible.

Why does my check engine light turn orange?

When it runs into an issue that the ECU cannot correct, the check engine light (CEL) starts glowing. The light is typically yellow or orange, and features an image of engine with text telling the driver to check or service the engine or powertrain. The engine computer stores a diagnostic code when the light begins glowing.

Why is there a warning light on my diesel engine?

Some diesel-powered cars have a specific warning light for their diesel particulate filter (DPF), whereas others don’t and rely on the EML providing a warning instead. The latter is sometimes also illuminated if the car detects a fault with the differential pressure sensor, which determines how effectively the DPF is performing.

What are the reasons why the service engine light comes on?

  • One Sensor has a Loose Electrical Connection or is Damaged.
  • trucks and SUV’s are very carefully monitored for fuel economy and emissions.
  • Damaged O2 sensor.
  • Catalytic Converter is Clogged.
  • Air Filter or Fuel Filter is Dirty.
  • Mass Air Flow Sensor is Damaged.
  • Engine has Oil Lubrication Issues.

    Why would my engine light come on?

    Officially known as a malfunction indicator lamp, the check engine light can go on for a number of different reasons. In some cars, something as simple as a loose gas cap, which the car’s computer can read this as a leak in the emissions system, or even a change in humidity can cause the light to come on.

    What causes the service engine light to come on?

    • Loose gas cap. This is one of the most common causes of the service engine indicator light to go on.
    • Spark plug issues. Spark plugs are an essential part of the combustion process in your engine.
    • Malfunctioning oxygen sensor. Oxygen sensors monitor the levels of oxygen in the gas that is leaving the engine.
    • Faulty Mass Airflow Sensor.

      What to do if your check engine light is on?

      If the check engine light comes on, here are some tips on what you should do: Look for a serious problem that requires immediate attention. Check your dashboard gauges and lights for indications of low oil pressure or overheating. Try tightening your gas cap. This can often solve the problem. Reduce speed and load.