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Check Engine Light

So your CHECK ENGINE light is on?

Don’t panic! We Have The Answer. Let us take a look at your car, for FREE.

When the light comes on, turn to T&K to check it out and get the repairs you need to get back on the road – lights out and worry-free! Thousands of drivers across the US, Canada and Puerto Rico trust T&K when their Check Engine light comes on. So our experts put together this quick guide to help you understand that mysterious glowing light!

What is my CHECK ENGINE or SERVICE ENGINE SOON light?

All modern vehicles are equipped with an onboard computer diagnostic system (OBD II) that constantly monitors your vehicle’s major operating systems and most importantly the power-train (engine and transmission). The main purpose of monitoring these systems is to insure that the vehicle is operating at top efficiency with the lowest possible emissions. As fuel economy and emission control has become increasingly important and complex, your vehicle’s electronics systems need to constantly adjust and fine-tune various parameters according to driving conditions (such as vehicle load, temperature, and air/fuel mix to name just a few). When the computer reads that any of these parameters do not fall within the acceptable range for operating the vehicle, your CHECK ENGINE LIGHT is lit to warn you that you may have a serious problem and to take your vehicle to a certified technician – such as your local T&K technician – to check the faults and restore it to manufacturer’s specifications.

What is the FREE check?

Reading the codes from your car’s computer system is similar to a doctor measuring your blood pressure when you schedule a visit. High blood pressure doesn’t tell the doctor what is wrong with you it simply lets the doctor know there is something wrong and points him or her in the right direction to find out what it is. Just like the CHECK ENGINE LIGHT codes tell your T&K technician there is something wrong and points him or her in the right direction, too. If the code indicates a problem with your O2 (oxygen) sensor system, it doesn’t necessarily mean you need a new O2 sensor. Be wary of garages that read your code and tell you immediately that you need a major repair.

Get Your Free Check Engine Light Coupon Here…

What does the CHECK ENGINE LIGHT usually mean?

There are hundreds of codes that could trigger your CHECK ENGINE LIGHT for dozens of reasons each. Even the most common reasons can have many possible causes. Some top CHECK ENGINE LIGHT codes are:

  • Problem with the Mass Air Flow (MAF) sensor or circuit. You may not notice any serious drivability problems, although there may be symptoms such as a general decrease in power or sluggishness. This could be caused by a simple connection problem of the sensor, a wiring connection may be bad or dirty or the Mass Air Flow sensor may be faulty.
  • System Running Too Lean. An oxygen sensor detected a lean condition (too much oxygen in the exhaust). You may notice a lack of power, detonation (spark knock), and/or a hesitation/surge on acceleration which could be caused by a dirty Mass Air Flow sensor or air filter, or a vacuum or exhaust leak in the system.
  • System Running Too Rich: The oxygen sensor detected a rich condition (or a too-high fuel to oxygen ratio). You may experience misfires with this condition. This condition can be caused by a dirty or faulty Mass Air Flow sensor, air filter, a blockage or restriction in the airstream, a fuel pressure, fuel injector, or fuel delivery problem.
  • Cylinder Misfire: A P0300 series of codes indicates a random or multiple misfire in your engine. You may find your engine harder to start, the engine may stumble, idle rough, and/or hesitate among other driveability symptoms. This could mean anything from faulty spark plugs or spark plug wires, a bad ignition coil, a vacuum or air leak, to a serious mechanical problem in your engine. This code is serious when flashing and can cause faulty catalytic converter(s).
  • Knock Sensor Circuit Malfunction: Your vehicle’s computer constantly adjusts and retimes the engine so that it doesn’t produce harmful pre-ignition detonation or knock. With this malfunction you may notice drivability problems including -not surprisingly-knocks and a lack of power and hesitation. It could mean the knock sensor is faulty and needs to be replaced, that there is a wiring short/fault in the knock sensor circuit, or that you have other problems that the knock sensor cannot control.
  • Insufficient EGR (Exhaust Gas Recirculation) Flow: Your vehicle recirculates exhaust back into the combustion chamber to better achieve optimal combustion chamber temperature and to reduce NOX (a harmful greenhouse gas). This light triggers when there is insufficient EGR flow in the combustion chamber and you may notice a pinging when the vehicle is at higher speeds. There may also be other symptoms. It could be a faulty sensor, valve or blockage in the EGR (tube) from a carbon buildup.
  • Catalyst System Efficiency below Threshold : The oxygen sensor after the catalytic converter is detecting that the converter is not working as efficiently as it should be (according to specs). You will likely not even notice any drivability problems though your vehicle may have anything from an oxygen sensor not reading (functioning) properly to a damaged exhaust manifold, or a bad catalytic converter.

And these are just a few of the hundreds of codes, causes, and symptoms. Each has multiple fixes.

Check Engine Light Code Diagnostic?

Let the experts at T&K check this out for FREE!

When your check engine light turns on, your vehicle is giving you a heads up that something is about to go wrong. The vehicle does this by recording a series of 1 to 9 six digit code or information on the problem. This code lookup requires a hand held computer or scanner to be plugged into the car’s computer system to read and diagnose the series of codes. Yes, the engine light can be turned off.

When you ignore a check engine light you risk:

  • Further engine or transmission damage
  • Poor gas mileage
  • Vehicle performance problems
  • Serious repair cost

There are three common and very useful computerized tools used by T&K that can assist you in diagnosing your vehicle and turn off the check engine light:

  • A Scan Tool can be used to read and erase trouble codes, display, record and play back LIVE diagnostic data and perform other tests allowed by the vehicle maker. We have scan tools that cover vehicles 1982 to present depending on required coverage.
  • A Code Reader can be used to read and erase diagnostic trouble codes as well as other additional features depending on the tool. These tools work on all vehicles 1996 and newer.
  • A Code Scanner reads diagnostic trouble codes generated by the vehicle’s system. Codes are displayed on the vehicle’s dashboard and/or identified through audio prompts. These products work with 1981-1995 vehicles.

What is my CHECK ENGINE or SERVICE ENGINE SOON light?

All modern vehicles are equipped with an onboard computer diagnostic system (OBDII or OBD 2) that constantly monitors your vehicle’s major operating systems and most importantly the power-train (engine and transmission). The main purpose of monitoring these systems is to insure that the vehicle is operating at top efficiency with the lowest possible emissions. As fuel economy and emission control has become increasingly important and complex, your vehicle’s electronics systems need to constantly adjust and fine-tune various parameters according to driving conditions (such as vehicle load, temperature, and air/fuel mix to name just a few). When the computer reads that any of these parameters do not fall within the acceptable range for operating the vehicle, your CHECK ENGINE LIGHT is lit to warn you that you may have a serious problem and to take your vehicle to a certified technician – such as your local T&K technician – to check the faults and restore it to manufacturer’s specifications.

OBD2 Codes Explained

OBD-II codes consist of a number of parts. Here is a sample OBD2 code: P0171

Here is a breakdown of what each digit of the code means:

First Character – System

The first character identifies identifies the system related to the trouble code.

P = Powertrain
B = Body
C = Chassis
U = Undefined

Second Digit – Code Type

The second digit identifies whether the code is a generic code (same on all OBD-II equpped vehicles), or a manufacturer specific code.

0 = Generic (this is the digit zero — not the letter “O”)
1 = Enhanced (manufacturer specific)

Third Digit – Sub-System

The third digit denotes the type of sub-system that pertains to the code

1 = Emission Management (Fuel or Air)
2 = Injector Circuit (Fuel or Air)
3 = Ignition or Misfire
4 = Emission Control
5 = Vehicle Speed & Idle Control
6 = Computer & Output Circuit
7 = Transmission
8 = Transmission
9 = SAE Reserved
0 = SAE Reserved

Fourth and Fifth Digits

These digits, along with the others, are variable, and relate to a particular problem. For example,a P0171 code means P0171 – System Too Lean (Bank 1).

And these are just a few of the hundreds of codes, causes, and symptoms. Each has multiple fixes and requires a scan tool or computer to read them. At T&K, we use up todate, professional Scan Tools and Code Readers that are designed to communicate with cars and light-duty trucks which comply with US emission standards.

So come by today for a Free Check Engine Light Check reading and diagnostic. You will then have the facts.

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* Cannot be combined with any other offer. Coupon must be presented at time of vehicle drop off. Max $100 Discount. Discount on Labor Only. One coupon per customer/vehicle ** See store for details.

Transmission Fluid Service – $89.95
Drain Old Transmission Fluid. Replace Filter or Clean Screen. Replace Pan Gasket. Perform Leak Check. Fill with Clean Fresh Fluid.
Code: JJC003
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* Filter, Additives, and any gaskets are done at additional charge. Other additional charges may apply. Valid on most vehicles. Cannot be used on any transmission with internal transmission issues. May not be combined with any other offer Present coupon at time of service. Cannot be combined with any other offer. Must be shown at time of vehicle drop off. One coupon per customer/vehicle. ** See store for details.

Free Oil Change With Any Repair Over $250.00*
Install new filter. Replace with up to 5 quarts basic Motor Oil Belts and hoses check.
Code: JJC009
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* On final invoice of $250 and above. Offer valid for the first five quarts of oil and does not include additional quarts if needed. Price does not include state or local fees. Discounted price applies to Basic Motor Oil Change only. Other oils available at additional cost. Additional desposal and shop supply fees may apply. Most vehicles. Not valid with other offers. No cash value. ** See store for details.

Free Check Engine Light Diagnostic
So your CHECK ENGINE light is on? Don't panic! T&K Automotive Specialists Has The Answer. Let us take a look at it. We'll give you the Facts, annd remember, it's now for FREE.
Code: JJC005
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* Our normal $34.95 Check Engine Light Diagnosis Service is FREE for a limited time. Coupon must be presented at vehicle drop off. One coupon per vehicle. Additional charges may apply. May not be combined with any other offer. Includes reading and reporting trouble codes. May exclude some vehicles 1996 model year or earlier. ** See store for details.

Standard Oil Change – $19.95
Install new filter. Replace with up to 5 quarts of Castrol EDGE with SPT, SAE 5W-30*. Belts and hoses check
Code: JJC001
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* Offer valid on first five quarts of oil and does not include additional quarts if needed. Price does not include state or local fees. Discounted price applies to Basic Oil Change only. Other oils available at additional cost. Additional desposal and shop supply fees may apply. Most vehicles. Not valid with other offers. No cash value. ** See store for details.

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Code: JJC010
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* Cannot be combined with any other offer. Coupon must be presented at time of vehicle drop off. Max $100 Discount. Discount on Labor Only. One coupon per customer/vehicle ** See store for details.

Semi-metallic Brake Pad Replacement – $99.95
Price is per axle. * Comprehensive brake system evaluation. Install Semi-Metallic Brake Pad or shoes on front or rear axle. Lubricate caliper slides or backing plates.
Code: JJC007
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* Disclaimer: Valid on most vehicles and if brake pads are available in the given style. Additional charges may apply for rotor resurfacing or replacement, caliper repair or replacement, or hydraulic work. Cannot be combined with any other offer. Coupon must be shown at time of vehicle drop off. Taxes and fees additional. One coupon per customer/vehicle. No cash value. ** See store for details.

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Present this coupon for your free Air conditioning system inspection
Code: JJC011
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* Most vehicles. Additional charges to determine cost of repair may apply. Not to be combined with any other discount or special offer. Valid at our IRVING & ADDISON centers. Must be presented at the start of service. ** See store for details.

$100 Off Any Transmission Rebuild*
Come in now for the fast service you can trust!
Code: JJC004
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* Cannot be combined with any other offer. Must be shown at time of vehicle drop off. One coupon per customer/vehicle.. No cash value. ** See store for details.

Ceramic Brake Pad Replacement – $139.95
Price 'per axle'. Comprehensive brake system evaluation. Install Ceramic Brake Pad or Shoes Lubricate caliper slides or backing plates.
Code: JJC008
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* Disclaimer: Valid on most vehicles and if brake pads are available in the given style. Additional charges may apply for rotor resurfacing or replacement, caliper repair or replacement, or hydraulic work. Cannot be combined with any other offer. Coupon must be shown at time of vehicle drop off. Taxes and fees additional. One coupon per customer/vehicle. No cash value. ** See store for details.

10% Off Diesel Engine Repair
LIMITED TIME OFFER
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* Cannot be combined with any other offer. Coupon must be presented at time of vehicle drop off. Max $100 Discount. Discount on Labor Only. One coupon per customer/vehicle
** See store for details.

Synthetic Motor Oil Change: $44.95
Install new filter | Replace with up to 5 quarts Synthetic Motor Oil | Belts and hoses check
Code: JJC002
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* Offer valid on first five quarts of oil and does not include additional quarts if needed. Price does not include state or local fees. Discounted price applies to Synthetic Motor Oil Change only. Other oils available at additional cost. Additional desposal and shop supply fees may apply. Most vehicles. Not valid with other offers. No cash value. ** See store for details.

Free Coolant Inspection*
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Code: JJC012
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* Covers most coolants. Specialty Coolants not included. ** See store for details.

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