P1538

P1538

Diagnosis information - Control unit DME (DFI)

Activation Oil pump

INFORMATION
- The oil pressure-regulating valve is controlled via a PWM signal.
- The PWM signal depends, among other things, on the ambient conditions (temperatures, off time, etc), operating point of the engine (rpm, load, oil temperature), measured oil pressure (at the oil pressure sensor).
- fault is detected if the PWM signal is outside a defined range for > 8 seconds.

Diagnostic conditions
- Engine running

Possible fault causes
- Engine oil pressure too low
(Oil level , Oil quality , Oil dilution , Soiling Oil circuit , Oil circuit Faulty)
- Engine oil pressure too high
(Oil quality , Oil thickening , Soiling Oil circuit , Oil circuit Faulty)
- Oil pressure sensor Faulty
- Oil pressure control valve Faulty
- Oil pump Faulty