A dead battery after a couple of weeks could be due to a faulty battery or parasitic draw. Undercarriage washes help remove salt and sand, while spray wax is minimally effective and can smudge glass.

Viewer-submitted questions for The Car Doctor: Q: The battery in my Toyota Tacoma dies periodically. My shop thought it was a parasitic drain, but after testing any drain was gone after 20 minutes.

Viewer-submitted questions for The Car Doctor: Q: I own a 2011 Toyota RAV4 and a 2016 Jeep Compass. The Toyota owner’s manual says not to use the air conditioner when the “recirculating outside air” ...

Q: Is there a way to test an external battery pack before I go on a long road trip? A: With all the portable electronics we tend to bring on our trips these days, having a portable power source has ...

Q: About six months ago I had AAA install a battery in my 2015 Honda CR-V in my driveway, a very convenient option. Because of the high temperatures this past summer, do I need to check the water ...

An AGM battery should not affect radio operation, so check connections and perform a hard reset. A "miracle" car spray promising six months without washing is unlikely to work on heavy dirt. A faulty ...