At a local auto parts store
Does AutoZone Scan Check Engine Lights? AutoZone does. If your light is on, and you are wondering why, head down to your local AutoZone where one of our store associates can help diagnose the issue through our free Fix Finder service.
Many drivers don't realize that AutoZone, the nation's largest auto parts chain, will do the following services free of charge: Read the codes on your check engine light. Test your battery's voltage.
The average cost for check engine light diagnosis & testing is between $88 and $144. Labor costs are estimated between $88 and $144. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.
Common causes of a check engine light
If you've lost it, replace it with a new one. Oxygen sensor is bad: You'll need a new sensor — but identify which one is bad first. Spark plugs may be fouled or failing: Replace the spark plugs. Spark plug wires are bad: Try replacing the spark plug wires.
Free Testing
We'll check your alternator, starter, battery and more.
Low oil pressure
Low oil pressure is a common cause of a check engine light turning on, and it can seriously interfere with your car's performance. Usually, if this is the case, your oil light will also appear. ... In any case, low enough oil pressure will disable your vehicle, so get this repaired immediately.
Oil changes are essential maintenance for your car but it won't do anything that could trigger your check engine light to come on. If you notice the light after an oil change, something else is wrong.
If the check engine light comes on while you're driving, it can be unnerving. ... The check engine light means there's a problem somewhere in your emissions system. Regardless, you're safe to drive for now as long as the car isn't performing strangely. Just have the check engine light checked and the problem repaired.
Autozone's free diagnostic check is not extremely reliable. ... Autozone's "diagnostic check" may not be extremely accurate, but it is a free service that can offer valuable information while trying to fix a problem.
In many cars there is a tool to pull the fuses that might be located in the fuse box or in the fuse box cover. ... AutoZone will test your car's parts for free. We can test your car's battery*, alternator*, starter* and voltage regulator while they're still on your car.
O'Reilly Auto Parts offers free check engine light testing to help you diagnose the problem. Most of our stores can loan you a code reader for OBD 1&2 systems for vehicles from 1996 and up, except in areas where it is prohibited by law.
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