GMC Yukon check engine light code 101 triggers after overnight sitting, resolves after 20-30 minutes on GMC Yukon

Some GMC Yukon owners report experiencing check engine light code 101, which may trigger after the vehicle has been sitting overnight and resolve after 20-30 minutes. This issue can be linked to low oil and low oil pressure problems, particularly if the oil dipstick and oil fill cap are not properly seated following an oil change. Additionally, the presence of Diagnostic Trouble Codes (DTCs) indicates that the vehicle's computer has detected abnormalities. A common cause for the check engine light is a loose or faulty gas cap, which is typically an easy fix. Furthermore, the P0101 code may arise from issues such as a dirty air filter, prompting the PCM to activate the malfunction light. While this warning may not always signify a severe engine problem or costly repairs, it is crucial for owners to conduct a thorough inspection and seek professional assistance or utilize an OBD-II scanner if the issue persists.