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P018C indicates an issue with the fuel pressure sensor B. Here is a list of possible causes for you.
P018C CADILLAC - Fuel Pressure Sensor 'B' Circuit Low Read more: https://www.autocodes.com/p018c_cadillac.html
P069E indicates an issue with the fuel pump. Here is a list of possible causes.
P069E CADILLAC - Fuel Pump Control Module Requested MIL Illumination Read more: https://www.autocodes.com/p069e_cadillac.html
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