28B4

28B4 - P105C

Information saved in
DME

Fault code
28B4 - P105C

Fault text
Valvetronic servomotor, sluggish movement

Fault description
Valvetronic servo-motor, sluggish movement

Condition for fault identification
Test condition:
Engine running
Terminal condition: Terminal 15
Voltage condition:
none

Condition for fault memory entry
none

Action in service
1. If errors related to the DME main relay are present repair
these first
2. If other Valvetronic errors are present these are collateral
errors
3. Check the Valvetronic servo-motor's connection wires
(CMI-201(O_P_VVT1M) and/or CMI-202(O_P_VVT2M))
for open circuit/wire and mutual short circuits
4. Relearn travel limits, if not OK, replace Valvetronic
servo-motor and repeat 'Learn travel limits'

Fault effect and breakdown warning
None
none

Driver information
Warning light:
MIL ON

Service instruction
None