Final Control Diagnosis - Skoda Octavia Workshop Manual

01
Readout on V.A.G 1552
00537
Lambda control
Control limit exceeded
Control limit not reached
------------ ------------
Self-Diagnosis
Possible cause of fault
♦ Fuel pump faulty
♦ Fuel pressure regulator
faulty
♦ Lambda probe faulty -
change in characteristic as
a result of effect of chemi-
cals
♦ Fuel tank empty
♦ Injector(s) faulty (blocked)
♦ Short circuit to earth or
positive, or open circuit in
wiring between lambda
probe and engine control
unit
♦ Short circuit to earth or
positive, or open circuit in
wiring between lambda
probe and engine control
unit
♦ Fuel pressure too high
♦ Activated charcoal filter
solenoid valve N80 leaking
or jamming
♦ Lambda probe faulty
- change in characteristic
as a result of effect of
chemicals
♦ Injector(s) faulty (always
open)
Possible effects
♦ No lambda control
♦ Poor drivability
♦ Poor idling
♦ Emission levels not o.k.
♦ No lambda control
♦ Poor drivability
♦ Poor idling
♦ Emission levels not o.k.
♦ Increased fuel
consumption
OCTAVIA
Rectifying faults
- Test fuel pump
⇒ Engine, Mechanical
Components; Repair
Group 20
- Test fuel pressure regulator
⇒ page 24-44
- Replace lambda probe
- Refuel vehicle
- Test injectors ⇒ page 24-41
- Test lambda control
⇒ page 24-12
- Test lambda control
⇒ page 24-12
- Test fuel pressure regulator
⇒ page 24-44
- Test N80 ⇒ page 01-12,

Final control diagnosis

- Replace lambda control
- Test injectors ⇒ page 24-41
Edition 11.98
S00.5109.51.20