Volkswagen CJDA Workshop Manual page 48

3
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Indicated on display
Too high
00144/P0090
Fuel metering valve
-N290-
32 Repair Group 01 - Vehicle self-diagnosis
Possible cause of fault Possible effects
◆ Fuel level too low
◆ Leak in fuel system
◆ Fault in low-pressure
fuel system
◆ Fault in high-pressure
fuel system
◆ Metering unit is de-
fective
◆ Glow period warning
lamp -K29- lights up
◆ Exhaust emissions
warning lamp -K83-
lights up
◆ Reduced performance
◆ Increased exhaust
emissions
◆ Torque reduction or
shutdown
Fault remedy
– Checking fill level of
fuel tank
– Checking fuel system
⇒ P age 384
for leaks
– Check supplementary
fuel pump -V393-
⇒ P age 314
– Checking fuel pres-
sure regulating valve
⇒ P age
-N276- 391.
– Check return flow rate
from fuel pressure
regulating valve
⇒ P age 377
-N276-
– Checking fuel pres-
sure sender -G247-
⇒ P age
394.
– Check fuel metering
valve -N290-
⇒ P age 388
– Check CR system for
leaks
– Check operation of
low-pressure fuel sys-
tem
– Check operation of
high-pressure pump
– Check operation of
metering unit and
pressure regulating
valve