Skoda OCTAVIA 2004 Workshop Manual page 18

01
Readout on V.A.G 1552
Fault number
old
00553
Air mass meter -G70
Implausible signal
Open/short
circuit to earth
Short circuit to posi-
tive
Supply voltage
00575
Intake manifold pres-
sure
Control difference
if appropriate
Charge pressure
Control difference
------------ ------------
Possible cause of fault
new
16485
♦ Engine was stalled (within
the last 50 starts)
♦ Battery weak
♦ Sporadic open circuit in
wiring (cable break) to
needle lift sender -G80
♦ Air filter blocked
♦ Vacuum hoses of exhaust
gas recirculation incor-
rectly connected or me-
chanical EGR valve con-
stantly open
♦ Air mass meter faulty
17552 ♦ -G70 faulty
♦ Open circuit in wiring or
short circuit to earth
17553 ♦ -G70 faulty
♦ Open circuit in wiring or
short circuit to positive
17554 ♦ Open circuit in wiring or
short circuit
17958
♦ Hoses wrongly connected,
not fitted on, blocked,
leaking
♦ Turbocharger vacuum unit
faulty
♦ Charge pressure control
solenoid valve -N75 faulty
Self-Diagnosis
Possible effects
♦ Poor performance
♦ Air mass constantly indi-
cated in measured value
block
♦ Misfiring, jerking
♦ Fault 00542 Needle lift
sender implausible signal
possible or open/short cir-
cuit to positive
♦ Irregular idling, poor per-
formance
♦ Poor performance, jerking
♦ Reduced output
♦ Black exhaust possible
when accelerating from
low revs
♦ Sudden drop in power
♦ Reduced output
OCTAVIA
Rectifying fault
- Erase fault memory, con-
tinue checking vehicle
- Test battery
- Test needle lift sender
⇒ page 23-42
- Inspect intake system
- Inspect vacuum hoses
⇒ page 23-37
- Test air mass meter
⇒ page 23-35
- Test charge pressure
⇒ page 23-22
- Inspect charge pressure
hoses ⇒ page 23-27
Edition 02.99
S00.5111.53.20