Fortunately, the diagnostic trouble code (DTC) P1000 on the Ford Fiesta (and other Ford vehicles) is a general error code that indicates that the engine control computer (ECC) has been unable to check all the monitors since the last time the vehicle's battery was disconnected, or significant electrical repairs (including the PCM) have been made. Generally, to fix this error, You'll just need to drive the Fiesta through a drive cycle, until the system monitors are completed and/or in "ready" status. It's not a serious code; more like a communication error. However, if it persists, it can indicate issues with Your diagnostic system; this can lead to the inability to read codes in the future, and might point to problems with the ECC itself.
Joel J.
April 10, 2020
Code p1000 on a ford fiesta means that testing isn't complete for the obdii monitor. It occurs when powertrain hasn't done it's self diagnostic cycle assuring the vehicle is ready.
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