Frequently Asked Questions

What is the most common reason for check engine light on a 2018 Bentley Bentayga?

• Loose or failing gas cap — a simple seal issue can trigger emissions codes and is the easiest to check and fix.
• Oxygen sensor or catalytic converter issues — common causes on higher-mileage luxury engines that affect emissions and performance.
• Engine misfires — can stem from spark, fuel, or ignition components and may damage the catalytic converter if left unchecked.
• Mass air flow or EVAP system faults — sensors that regulate air/fuel can trigger the light and reduce efficiency.
• Bring your 2018 Bentley Bentayga to Bentley Boston for precise diagnosis; our factory-trained technicians can identify the root cause and protect long-term value.

How much does a check engine light diagnostic cost for a 2018 Bentley Bentayga?

• Diagnostic fees vary; a standard OBD-II scan at our service center identifies trouble codes quickly and is competitively priced compared with independent shops.
• We emphasize immediate and long-term savings—accurate diagnosis prevents unnecessary repairs and protects resale value.
• If repairs are covered under warranty, they must be performed at a certified dealership to preserve coverage; Bentley Boston handles warranty work promptly.
• Estimate and repair recommendations are provided after diagnosis; visit our Service Specials for offers: Service Specials.
• Schedule service online any time at our Service Scheduler: Service Scheduler.

What does it mean when the check engine light comes on in a 2018 Bentley Bentayga?

• It indicates the vehicle’s onboard diagnostics have detected a fault in emissions, engine, transmission, or related systems.
• The light can signal anything from a minor emissions leak to a serious engine misfire that requires immediate attention.
• Prioritize diagnosis—timely, accurate service at Bentley Boston often costs less than independent shops because we correct issues the first time, avoiding repeat visits.
• Warranty-covered repairs must be completed at a certified dealer; our factory-trained technicians ensure warranty integrity and long-term protection.
• Use our service scheduler to reserve a diagnostic appointment: /service-scheduler.htm.

What is the first thing to check when the check engine light comes on?

• Check that the gas cap is secure and intact—this quick step resolves many emissions-related codes.
• Note any changes in performance, noise, or dashboard warnings; these details help technicians diagnose more quickly.
• If the light is flashing or the vehicle behaves abnormally, stop driving and contact Bentley Boston immediately for guidance.
• For peace of mind, book a professional scan so a trained technician can interpret codes and advise on repairs that preserve warranty coverage.
• Learn about selling or trading a vehicle before service if applicable: Trade / Sell My Car.

How long does a check engine light service take?

• Initial code read and basic inspection typically take 30–60 minutes; more complex diagnostics or road testing may require additional time.
• If parts or deeper troubleshooting are needed, we provide a clear time estimate and prioritize efficient repairs to minimize downtime.
• Choosing Bentley Boston often results in faster, more accurate repairs because our technicians are factory-trained and use OEM procedures and parts.
• We focus on immediate and long-term savings—correct diagnosis prevents repeat visits and preserves vehicle performance and value.
• Schedule service quickly at: /service-scheduler.htm and view available service offers at /promotions/service/index.htm.