Saab 9000 - Diagnostic Trouble Codes P0105, P0106, P0107, P0108

Fault diagnosis 101
Diagnostic trouble codes P0105, P0106, P0107, P0108 (contd.)
1
· 1----
Diagnostic procedure
\ 1 Check the vacuum hose
Inspect the vacuum hose between the pressure sen-
sor and intake manifold for breaks, leakage, pinching
or clogging.
Is the vacuum hose OK?
I YES I Continue with point 2.
I NO 1 · Rectify the fault and proceed to point 4.
2 Check the pressure sensor's ground connec-
tion and power supply
- Turn the ignition switch to the ON position and
then back to the OFF position.
- Unplug the pressure sensor's 3-pin connector.
Take voltage readings in the connector across:
• pin 3 and B - -------approx. 5 V
• B+ and pin 1 ------ approx. 12 V
Are all readings OK?
I YES I Continue with point 3.
I NO I Rectify the lead in question and proceed to
point 4.
Saab 9000
I