Thread: Should the "o2" warning lamp illuminate when ignition turned on?
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Old 01-16-2007, 06:15 PM
Mike Freeman Mike Freeman is offline
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Join Date: Aug 2006
Posts: 141
Oxygen sensor light
86 & 87 420 SEL and 560 SEL have a circuit in the CIS-E control unit that turns on the O2 sensor bulb. The bulb should come on with key on and engine not running.
If the bulb does not light it has probably been removed.
Mike
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