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Free check engine light

check engine light image

My opinion on free check engine light services. There are a few different companies that offer a free scan of your vehicle to let you know why your light is on. I do not want to mention any names, but these companies are heavily advertising on TV. Just a few examples are a popular auto parts company and one of the largest transmission services. You can probably guess who they are.

These companies would not be spending large advertising dollars on TV if this service did not create revenue for their companies. The free check engine light service may seem like a great deal at first, but it can lead to complications, and even large auto repair bills.

Free check engine light diagnosis?

check engine light diagnosis image Let me give you a real world example of how this complementary service can backfire on you. I recently moved across the country to secure a new job working for local government. I left 20 years of loyal customers behind. A longtime customer that had his check engine light pop on contacted me.

I recommended that he purchase a diy auto scanner and retrieve the code and clear the check engine light himself. I explained to him, how simple it was to just plug in the scanner and read and erase the codes. He agreed and visited a popular chain auto parts store to buy one of these DIY auto scanners.

Here's what happened to my long-time customer. When he went to the parts store and asked to see the auto scanners available, a young man behind the counter offered to scan the vehicle for free. My customer took the sales clerk up on the scan.

free diagnosis of check engine light graphic The young man pulled an O2 sensor voltage low code specifically for bank one sensor 2 from the cars computer memory. The parts counterman said all you need to do is replace that sensor and reset the check engine light.

My customer's car was just out of warranty, as it had rolled slightly over 36,000 miles. He bought the oxygen sensor and a special tool to replace it. The grand total spent at the local parts store was $165.

He replaced the oxygen sensor and returned to the parts store to have the code cleared. On his return trip home within 5 miles the check engine lamp came back on. He went back to the parts store and they pulled the same code for bank one sensor 2.

To make a long story short my ex customer took his vehicle into the dealership and the vehicle had a bad catalytic converter. This was covered under the emissions warranty 7/70.

The repairs were completed at no charge. He asked for a refund at the local parts store, but was denied because oxygen sensors and electronic components are not returnable as per store policy.

DIY auto scanners

DIY auto scanners can be purchased for less than $45. You can read and erase codes yourself. If you erase your code and the check engine light comes back on. You can either take your vehicle into a dealership or auto repair center armed with the first stage of diagnosis to supply to your repair center.

This will let the shop know that one you are an educated automotive consumer and two you will have performed the first step in diagnosis, which is to retrieve and clear the codes. This process will save you money on your auto repair bill. If you have some do-it-yourself skills you may be able to repair this fault on your own.

A scan tool, coupled with the diagnostic chart for the code that has been set is 100% effective in solving even the most complicated problems. A good scanner that can read data streams will cost around $140. Add a subscription to all data for your specific vehicle, this will cost $30. So for about $170 you would be able to take care of unlimited check engine lights yourself. Or you could spend triple that for one single repair.

Free check engine light service warning

picture of diy auto scanner They say that nothing in life is free, and this applies to the free check engine light diagnosis. Let's be realistic, no company will spend millions of dollars on advertising that does not return anything for their investment. The two companies that I did not mention have different strategies at turning their free check engine light service into profits.

The parts company will pull your code and then sell you that part, without further diagnosis of the system. As in the above example, if you set an oxygen sensor code this does not mean that you need to replace an oxygen sensor. It means that you need to diagnose the code to find out what the problem is.

The service Company that offers the free check engine light diagnosis will pull your code and then prepare an estimate to solve your problem. In most cases, this estimate has been padded to include the diagnosis that they said was free.

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