Cupertino Auto Repair

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10100 Bubb Rd.
Cupertino, CA 95014

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Check Engine Light Issues

Written by maryp posted on Friday, March 9th, 2012

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It is true the check engine on the dash will sometimes turn off if you keep driving, but that does not mean that your BMW, MINI or Mercedes ahs healed it’s problem. Unfortunately, some drivers seem to believe that it will “just go away” if they wait long enough.

All the while fault codes are being stored, adaptations are happening in the systems, and one component being out of spec is affecting another and the situation is exacerbating. Your BMW or MINI will only “self-heal” for so long and then it’s time for some health care.

Of course, it didn’t “do it” while the car was at the shop. That’s when our BMW, MINI and Mercedes special tools that store data about the occurrence comes in very handy. It can be attached to the component, the car can be driven, (or not), and readings will be taken. At that point, it takes an experienced BMW or MINI technician to run a diagnostics to determine the root cause of the intermittent problem. We are talking of intermittent electrical issues, and the readings may not be consistent. Inconsistent readings usually prove that the component in question is on it’s last leg and doomed to fail completely.

Remember: A battery that is old or weak may also cause intermittent electrical problems. In some cases, a new battery has to be installed so that the readings are accurate. That way you will have a good “baseline”. Of course, you never want to replace a battery until it is necessary. We have a battery tester that will give you a reading of the health of your battery. That way you can be sure that it is only being replaced because it needs to be replaced!

Electrical intermittent issues may be one of the most exasperating problems for both the consumer and the tech. But, running a diagnosis is the only way to get to the root of the problem. Otherwise, it is just a guess as to what component needs to be replaced. It does not happen too often anymore, but every once in a while a new client does not see the value in running a diagnosis. At that point, we can ask you the customer, “what part do you want us to change?” – OK, we get it!

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