What does code p1000 mean on 97 experdition 4x4 5.4 motor

P1000 Jaguar Code - On Board Diagnostic System Readiness Test Not Complete link to info
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https://www.engine-codes.com/p1000_jaguar.html

INJECTOR TIMING PISTON POSITION SENSOR CIRCUIT and P1000 is OBD-II Monitor Testing Incomplete
Reset the timing sensor and the P1000 should go after a drive cycle.

If your vehicle is a Ford the P1000 means emission system diagnostic is not ready, & P1151 means you have an emission system problem. You will need to determine and fix the problem causing the P1151 before the P1000 code will clear. The P1000 code requires several driving/operating conditions be met before it will clear.

P1000 is a manufacturer specific fault code:

Ford P1000: OBDII Monitor Testing Not Complete.
Jaguar P1000: Engine control module (ECM) - internal error.
Kia P1000: System diagnosis incomplete.
Land Rover P1000: Engine control module (ECM) memory erased - no codes stored.
Mazda P1000: OBDII Drive Cycle Malfunction.

So depending on the manufacturer of your car would depend on the meaning of a P1000 code!

P1000 simply means that the computer has not completed all the self tests...once you get in enough tests that code will go away.

the p1000 is a system readiness code meaning the car is checking itself..it means its not finished etc but once it has the code will change to p1111..meaning system check completed, the c1165 is a abs or wheel speed code, check the wheel where this code is originating

what does it mean p1000 code

P1000 code means "testing incomplete". You can not reset this code, drive the vehicle and code should clear when the system recovers all testing data.
This can occur when the battery is disconnected for an extended period of time.

P1645 EVAP Solenoid Output Circuit
P1000 Scan not complete. meaning it didnt finish scanning

a p1000 code means that the system has not run all checks since last memory erase. in other words after a code erase this code is set until the car has been driven for 2 drive cycles which is 20 to 25 miles then 20 to 25 miles again.