Mercedes W210 ELAB error P1622 help

[t77]

Hello DK friends ,need help to remove error P1622 valve Y75 and correct checksum from Mercedes w210 E320 CDI 2000y.ECU Bosch 0 281 010 068 A025 545 56 32 flash 29F800
THX for advance

[massiwe]

In the dieselpomp there is electric valve of ELAB but in the pomp itself there is under ELAB coil one small piston with spring.
It should stop your engine when ELAB is activated, you can try with actuations via your diagnostic tester.
If engine is still running with activated ELAB, this small piston is not moving anymore. You can try to kick one, shake one, whatever to get moving again - then your fault is gone ;)
Otherwise replace HP pomp.