20-Year-Old Bentley Continental GTC Road Trip: Check Engine Light Woes

Bentley Purchase and Initial Road Trip Plan

• 💡 A 2007 Bentley GTC Convertible was purchased in Naples, Florida, for $35,000.
• 🚀 The car features a 6-liter twin-turbo W12 engine, a powertrain shared with other Volkswagen Group vehicles.
• 🛣️ The plan was to road trip the Bentley approximately 2,500 miles back to Colorado, after a pre-purchase inspection.
• ⚠️ The owner notes common issues with these cars include vacuum lines under the hood.

Unexpected Check Engine Light

• 🚨 Shortly after purchase, the check engine light illuminated, raising concerns about the long journey.
• 🔍 A scan tool revealed a P0171 code, indicating a lean condition on bank one, potentially caused by vacuum leaks, a faulty mass air flow sensor, or fuel system issues.
• 🛠️ The initial troubleshooting step involved replacing the gas cap with a Volkswagen Phaeton cap, as the original seal appeared cracked.
• 🤔 Despite the inspection and assurances, the persistent check engine light caused anxiety about the reliability of the Bentley for the cross-country trip.

Road Trip Challenges and Discoveries

• 🚗 The Bentley, despite the check engine light, proved to be a comfortable grand tourer with a smooth ride and quiet cabin.
• ⚠️ The trunk lid was found to have a gap and difficulty closing properly, a potential issue for water ingress, though it did not affect drivability.
• 🔄 The check engine light repeatedly came on and was cleared multiple times throughout the journey, with the P0171 code persisting.
• 💰 The potential repair for vacuum lines, a known issue, could be costly, possibly requiring engine removal or significant labor, estimated around $3,000 for this model year.

Journey Continues Despite Issues

• 🛣️ The road trip continued through Georgia, Tennessee, and Kentucky, with the owner and friend James documenting the experience.
• ⛽ The car averaged under 18 MPG, which is considered reasonable for a W12 engine.
• 📍 The journey involved stops for meals and navigation, with the Bentley's comfort being a highlight.
• 🤞 Despite the ongoing check engine light, the car continued to run well, leading the owner to accept it as a potential nuisance for the remainder of the trip.
• 🚗 The owner acknowledges the risks and potential high repair costs associated with buying an older, complex luxury car.