Review Of 2003 Audi A4 3.0 Flashing Check Engine Light 2023. Web on audi a4 3.0tdi one side of differential pressure sensor is open to atmosphere, putting finger over this pipe did not affect the readings. If the 'check engine' light suddenly comes on in your audi, it may be time to bring your vehicle in for service.
Web my 2003 audi a4 (3.0) has 86k miles and the check engine light switches back and forth from blinking to staying solid. Web check engine light 2003 a4 3.0. The check engine light came on while driving on highway @ 65 mph.
