Some think that when the check engine light comes on, the engine computer tells the technician exactly what the problem is. The reality is much different. The trouble code just tells your Reading technician what engine parameter is out of range, not what's causing it. Your Reading technician at H & B Napa Auto Care will determine the underlying problem that's causing the symptom. As you can imagine, some automotive diagnoses are quick and easy. Others are more involved and difficult. Of course, we at H & B Napa Auto Care want to figure out what's wrong with your vehicle and get you back on the road as quickly as possible. Give us a call today!