Skoda OCTAVIA MK1 Service Manual page 140

00524
Knock sensor 1 -G61-
defective
implausible signal
00525
Lambda probe -G39-
Output open
Earth distribution to
t
-G42- defective
Signal input in the
engine control unit
t
defective (engine
control unit defective)
t -G61- defective
Knock sensor loose or
t corrosion at the
connector
Line interruption or
short-circuit to positive
or to earth and/or to
t shielding of the signal
line between the knock
sensor and the engine
control unit
Signal input in the
engine control unit
t
defective (engine
control unit defective)
loose ancillaries
through which the
t knock sensor detects
additional signals
(vibrations)
Line interruption or
short-circuit to earth or
t positive between -G39-
and the engine control
unit
up phase, transient
malfunctions
Irregular idling or no
idling in cold-
t
running or warming-
up phase
reduced
t
performance
Increased fuel
t
consumption
t no lambda control
140
Replacing engine
–
control unit
→ Chapter.
Check -G61-
–
→ Chapter.
Remove open
circuit in wiring or
short circuit
– according to
current flow
diagram → Current
flow diagrams and
Fitting locations.
Replacing engine
–
control unit
→ Chapter.
– Remove open
circuit in wiring or
short circuit
according to
current flow
diagram → Current
flow diagrams and