We just purchased a 2011 SEL, and the engine light has just come on. While checking around the car, I see a locking gas cap on the capless filler. Unfortunately, the seller forgot to discuss this with us, or give us a key. They are nice people, are we are working through. But I just want to ask - is this a normal thing, to put a locking cap on the filler? Is it known to trigger the engine light?