Cadillac Escalade ESV check engine light flashing and rough idling due to internal engine problem requiring replacement on Cadillac Escalade ESV

Some Cadillac Escalade ESV owners report experiencing a flashing check engine light accompanied by rough idling, which may indicate serious internal engine problems that could necessitate replacement. These issues can stem from a misfiring engine, often linked to various underlying engine faults, and troubleshooting with Diagnostic Trouble Codes (DTCs) is recommended to pinpoint the exact cause. Additionally, some owners find that a faulty O2 sensor triggers the check engine light, leading to rough idling and poor fuel economy. Furthermore, problems with the ignition coil can result in engine misfires, causing the vehicle to shake and presenting symptoms such as difficulty starting and reduced fuel efficiency. It is critical for owners to address a flashing check engine light promptly, as neglecting these warnings can lead to more severe damage and increased repair costs. Seeking professional assistance is advised to properly diagnose and repair any internal engine issues to maintain the vehicle's performance and safety.