If you hear the term, diagnostic trouble codes (DTC), these are just another name for check engine light codes. These are automotive computer codes stored by the ECM, again known as the OBD (on-board computer diagnostic system) in your XC60. There are hundreds of different codes that your check engine light can accurately represent. 4,107. Fluid levels have nothing to do with a check engine light. The scanner that the auto parts store used only checks the general OBD II codes, it can't see all of Volvo's proprietary diagnostic codes (this is true for all manufacturersthey have to provide the OBD II codes, but they've got their own data available using their own Light illuminated permanently: The parking brake is activated. Flashing: an error has occurred with the parking brake. Read the message in the driver display. Faults in the electrical system An error has occurred on the electrical system. Read the message on the driver display and contact a workshop. #1 · Jan 4, 2019 Hello all! First time Volvo owner here. We were (kinda still "are") excited about our new plugin hybrid suv. But we got multiple issues in 6days and ~120miles. My OBD2 scanner shows the following errors: -P0EBF which has no definition -P0AE3 which is Hybrid Battery Precharge Contactor Circuit Stuck Open. Video Description A check engine light can indicate a broad spectrum of problems with your 2010 Volvo XC60. If you have a flashing check engine light, turn off the engine immediately to prevent potential motor damage. UddO3.