Check Engine Light Flashing

A flashing check engine light in a 2017 BMW 6 Series Gran Coupe 640i is a clear indicator of a serious condition that needs immediate attention. A flashing light typically signals misfires that can damage the catalytic converter and rapidly increase repair costs if ignored. At Nalley BMW of Decatur in Decatur, GA, our certified BMW technicians prioritize these emergencies; we combine OEM diagnostic tools with manufacturer-level training to identify misfires, ignition or fuel delivery faults, and related issues quickly. Addressing a flashing light immediately often prevents downstream failures and larger bills — a focused, accurate repair at our dealership can save you both time and money compared with repeated, partial fixes. We also offer service financing to help you proceed with necessary repairs right away and a variety of service specials to reduce out-of-pocket expense. To protect your vehicle and avoid catalytic converter damage, schedule service online or contact our service team for same-day options.

2017 BMW 6 Series Gran Coupe 640i Check Engine Light Reset

Resetting the check engine light on a 2017 BMW 6 Series Gran Coupe 640i is straightforward when performed by trained technicians, but a reset without proper diagnosis can mask underlying problems and lead to costly failures. At Nalley BMW of Decatur we emphasize transparency: we document diagnostic codes, explain root causes, and only reset the light after confirming that faults have been corrected using OEM parts and factory procedures. This ensures warranty integrity — any repairs covered under warranty must be performed at a certified dealership to remain valid — and maximizes long-term reliability and resale value. Choosing dealership service also yields accurate maintenance records, certified technicians, and genuine BMW parts that fit and perform to factory standards. We provide clear estimates, available discounts through our service specials, and service financing to make the right repairs affordable. To protect your vehicle’s systems and maintain warranty coverage, please schedule appointment with our service center.

2017 BMW 6 Series Gran Coupe 640i Check Engine Light Codes

Common check engine light codes on the 2017 BMW 6 Series Gran Coupe 640i include misfire codes (P0300–P0306), oxygen sensor codes (P0130–P0167), and emissions system codes such as EVAP faults (P0440–P0455). Misfires left unresolved can ruin catalytic converters and increase repair costs significantly; oxygen sensor failures reduce fuel economy and increase emissions, while EVAP issues may be simple (loose cap) or require component replacement. In Decatur, Nalley BMW of Decatur offers full-code scans, accurate troubleshooting, and OEM repair solutions that minimize both immediate repair expenses and long-term ownership costs. We pride ourselves on fast turnarounds, factory training, and customer-focused service so you get reliable results and documented repairs that preserve vehicle value. Take advantage of our service specials and service financing to manage costs, and schedule service online for a prompt diagnostic appointment.