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What purpose do oxygen sensors serve in an automobile engine?

A gasoline engine uses an electrical spark to ignite a mixture of gas and air. The resulting combustion creates motion in the moving parts of the engine, ultimately producing movement of the vehicle. If this mixture has less air than the optimal ratio, the vehicle runs rich and emits unburned fuel. This unburned gasoline decreases fuel efficiency and increases carbon-based pollutants in the vehicle's emissions. If the mixture has too much air than the optimal ratio, the vehicle runs lean and emits excess oxygen. This extra oxygen causes poor engine performance and creates nitrogen-oxide p..

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Where can I buy dexos motor oil?

General Motors repair shops are one source for dexos oil. However, many auto parts stores carry products that meet dexos specifications. O'Reilly Auto Parts lists several dexos oils on the website. Product examples include Mobil 1 Synthetic 5W-30, Mobil 1 Synthetic 5W-20 and Pennzoil Motor Oil. All of these items are described as "Meets GM dexos 1 Specification" in the product description.\nWalmart is a traditional discount retailer that sells motor oil products, including ones that meet the dexos specification. As of January 2015, the store has an online product page listing "Pennzoil 5W..

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How do you know if auto repair shops are inflating their labor times?

AutoMD recommends customers clear up any questions upfront, before work is done to their cars. To avoid inflated labor times, they recommend getting the mechanic to write down, in clear and certain terminology, everything they will do, along with individual time estimates for every step. Some shops try to start labor without disclosing their labor rate to a customer, which can make deducing individual costs from the bill difficult. Customers ought to be wary of tactics like a labor matrix, which some auto shops use to retroactively change labor costs depending on some arbitrary system. Custome..

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What does it mean when the check engine light stays on in a Mercedes-Benz?

When the check engine light comes on in the vehicle, it is important to take the vehicle for servicing by a qualified specialist. The specialist can perform diagnostic testing to determine the true cause of the light coming on and recommend a fix for the problem. In some cases, an immediate repair is not necessary, but fixing the problem sooner rather than later can prevent more expensive repairs at a later date.\nSome service stations such as Aamco offer free checking of the check engine light. There are also devices that owners can purchase that diagnose the vehicle’s problem, ranging as l..

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How do you select the correct Napa oil filter?

To use the NAPAOnline Filter Search tool, enter a vehicle or part number into the search box of the tool, and click Go. The website either lists the compatible filter or filters for the specific vehicle entered or finds the part number in the system’s database.\nTo use the Filter & Interchange Quick Search tool, click on the Search NAPA Filters link, enter the vehicle’s model, make and year under the Quick Search heading, and click on Search. It is also possible to search by NAPA part number by entering the part number into the filter search. To see compatible filters, enter the competing ..

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Where do you take the learner's permit exam?

Before taking the exam, individuals must apply for the permit. The exact requirements for this also vary by city and state. In Alabama, an individual must provide a birth certificate, proof of a Social Security Number, proof of either school enrollment or graduation, and proof of enrollment in a driver's education course if the individual is 15. Additionally, an individual must pay for both the test fee and the licensing fee.

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How do you find Toyota paint codes?

After locating the paint code on the side of the vehicle it can be ordered from the dealership. Paint codes are required in order for a person to order the proper color mixture when touching up paint or when completely changing its color scheme.The exact number is placed after C/TR on the vehicles sticker inside the driver side door jam. As of 2015, the color code is located in the same spot on every Toyota vehicle currently available on the market.

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What is the difference between Dexron-II and Dexron-III?

One of the biggest differences between Dexron-II and Dexron-III, aside from their different names and the different years in which they were developed, is the fact that Dexron-II was originally marketed with alternative ingredients such as jojoboa oil. This reflected the public trend toward "natural" ingredients that became popular in the 1970s. Subsequent versions of Dexron-II were released to compensate for the issues caused by the use of inferior ingredients in the original Dexron-II, including Dexron-IID and Dexron-IIE.Only one version of Dexron-III was ever marketed after it hit the marke..

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Is there a chip in my car key?

Transponder keys or chip keys power a vehicle's ignition using circuits that emit signals with radio frequencies. They were created in the 1990s to prevent car theft, which happened at a high rate at that time. Each chip key is modified for each model to create a unique response and protect the vehicle. An auto dealership specific to the car model or an automotive locksmith has the expertise to determine if a key has a transponder.

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What are the model options for the Chevy Trailblazer?

The Chevy Trailblazer is a midsized sport utility vehicle. Chevy introduced it as an upscale trim line of the Chevy Blazer. In 2002, the Trailblazer became its own separate line and lasted until 2009. In 2002, the Trailblazer won the North American Truck of the Year award for many of its features.\nSome of the model options of the Chevy Trailblazer are six-cylinder or eight-cylinder options. The six-cylinder engine is very powerful because it is an in-line engine and has an available 273 to 302 horsepower. The eight-cylinder engine saves fuel by utilizing its built-in Active Fuel Management sy..

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