Saab 9000 - Diagnostic Trouble Code P0141

134 Fault diagnosis
Diagnostic trouble code P0141 (contd.)
3 Check the heating circuit ground conne9tion
and power supply
- Unplug the oxygen sensor's 4-pin connector.
- Start the engine and run it at idling speed until
the coolant temperature is above 50°C
(122° F).
- Connect the test lamp to:
• pin 1 and B-
• B+ and pin 2
Does the test lamp light up in both cases?
I YES I Change the sensor and continue with
point 4 .
. I NO I Rectify the lead in question and proceed to
point 4.
Saab 9000