This does not address the problem of the 'missing' EKP in INPA (which should be at ADR 17) but:
2722:
Fuel-pressure sensor, signal - Fuel Pressure Regulator 1 Control Circuit
Sensor value > 9.5 bar (K_PKS_DIAG_MAX)
Terminal condition: TERM87
1. Clear fault memory, PKS system test
2. Check plug and wiring harness to PKS
3. If OK, replace sensor
Did you check the wiring for continuity?
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