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

Fault diagnosis 101
Diagnostic trouble codes P0105, P0106, P0107, P0108 (contd.)
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· 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?
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YES
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Continue with point 2.
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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?
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YES
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Continue with point 3.
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NO
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Rectify the lead in question and proceed to
point 4.
Saab 9000
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