2015 Audi A3: What Caused Recent Check Engine Light?
by Cameron Rogers, Associate Editor @ 16,933 miles on October 2, 2015
One of the most groan-inducing experiences of car ownership is seeing the check engine light illuminated in the instrument panel. Unfortunately, one of these beauties popped up recently in our 2015 Audi A3. I wanted to get out from behind my desk for a few minutes, so I volunteered to make the run.
I didn't notice any odd behavior from the car (and I've spent a bit of time in it) during my drive to Santa Monica Audi for a diagnostic check.
I showed up on a Tuesday before noon without an appointment, which proved to be a mistake. The dealer was inundated with service requests and wouldn't be able to examine the A3 until the next day. I told the advisor I would leave the car overnight.
The advisor called a few hours later and asked if I wanted the 15,000-mile service performed while the car was in. We delayed taking the A3 in for its second service because the Boise Incident that occurred 5,000 miles previously included an oil change. I told him to go ahead and do the service, which involved an oil change, tire rotation and a comprehensive list of vehicle checks.
The A3 was ready late the next day. The check engine light was due to a faulty natural vacuum leak detection (NVLD) sensor, which checks to make sure there are no leaks in the evaporative system. A subsequent online search of faulty NVLD sensors in Audi products yielded few results. It seems to be either an irregular problem or owners have not reported this particular part failure.
In either case, Audi issued a technical service bulletin (2035073/9) for this issue. It was replaced at no cost.
Cameron Rogers, Associate Editor @ 16,933 miles