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CHECK ENGINE LIGHT CODES,Sensors, OBD-II scan tool,Engine Light Diagnosis

September 13, 2017

Today's engines contain sensors to tell the vehicle's computer what's going on. Car sensors check for fuel-air mixture, incoming air temperature, wheel speed, and manifold pressure. They then tell your vehicle's computer what to do, based on that information.

Like anything else, sensors wear out, corrode, or become dirty. This essentially blinds the computer and triggers the dreaded check engine light. An Al-Rafay Auto Parts Team Member can read your OBD codes at Our local store for you.

 

When sensors fail, your engine may experience poor gas mileage and performance. In severe cases your engine may fail. So it pays to replace worn automotive sensors right away.

Here are a few common sensors you may encounter in your vehicle:

  • The idle air control valve (IAC) helps regulate the amount of air entering the engine at idle. The idle air control valve is usually located on the throttle body. It helps in the engine warm up process much like the choke on a carburetor.

  • The manifold absolute pressure sensor (MAP) checks for variations in air pressure coming into your engine. The computer senses these variations and delivers the right amount of fuel and spark.

  • The intake air temperature sensor (IAT) helps the computer regulate exhaust gas recirculation for cleaner tailpipe emissions. The intake air temperature sensor is usually located in the air cleaner housing.'

  • The O2 sensor is located in the exhaust stream and monitors the content of the exhaust gases leaving the engine. It's a key part of the emissions control chain and helps the engine computer calculate fuel mixture and fuel delivery. A failing O2 sensor often results in a rich-running condition and black tailpipe smoke.

  • The mass air flow (MAF) sensor monitors the volume and density of air entering the engine; it works with the O2 sensor to calculate fuel delivery on the front end, as the O2 sensor monitors gases on the back end.

  • The crank position sensor monitors the rotational speed of the crankshaft and uses this information to help govern fuel mixture and spark advance. It may be located on the flywheel, the main crank pulley, the camshaft or the crank itself. If the crank position sensor fails, the engine may not start at all.

  • Anti-lock brake systems (ABS) work by sensing and comparing wheel rotation speed. If wheel speed is unequal, the anti-lock brake system computer senses impending lockup; through a network of valves and pumps, it then proportions braking pressure to prevent wheel lock.

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     So If your facing any problem Call and get appointment with us so we can help you out 

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    Call 02135383616 

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    A flashing check engine light is typically indicative of a serious problem affecting your vehicle's ignition, fuel or emission systems. If your check engine light is on or flashing, it's time to come into Our Work shop Al-Rafay Auto Repair for Care store for a car diagnostic. Our auto service professionals will investigate the check engine code error and troubleshoot the problem. If you delay a car diagnostic or necessary engine repair, the problems and costs can quickly escalate.

    When you bring your car to Al-Rafay Auto Repair, our experienced  Professionals will perform on-board diagnostics and determine why your check engine light (service engine soon) is on or flashing. While it's impossible to say exactly why a check engine light is on or flashing without being able to examine the vehicle and perform a car diagnostic, possible causes of a steady or flashing check engine light can include:

 

  • Failing oxygen sensor

  • A loose gas cap

  • Bad spark plug/ignition coil

  • Bad spark plug wires

  • A problem with your catalytic converter

  • Bad mass air flow sensor

  • Engine vacuum leak

  • EGR valve problem

  • Excessive gas consumption or release of air pollutants

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  • WHY DOES MY CHECK ENGINE LIGHT COME ON WHEN I START MY CAR?

    It's common for the check engine light to come on momentarily when you first start your vehicle and then go off. This is a normal sign that the car is testing its circuits.

     

     

     

     

     

     

     

     

STEADY VS. FLASHING CHECK ENGINE LIGHT

If the check engine light is on, but steady rather than flashing, this means there is an issue, but it's not yet serious. This, however, does not mean you can afford to ignore the check engine light. An engine diagnostic is still called for to avoid expensive engine repair costs.

 

WHY DOES MY CHECK ENGINE LIGHT COME ON WHEN I START MY CAR?

It's common for the check engine light to come on momentarily when you first start your vehicle and then go off. This is a normal sign that the car is testing its circuits.