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Shouldn't a 1-2-1 code trigger the check engine light? 200 1990

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posted by  lucid on  Thu Jul 14 13:58 CST 2005
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To answer your question—yes. That's according to Bentley, and Haynes of course.

I don't have any Volvo documentation on this, but my Regina FI fault tracing manual seems to imply that weak signals (talking about the MAP sensor—no AMM in Regina FI) will set 1-2-1, but not set the Check Engine light unless a total loss of signal is detected.

That may just be my interpretation of how it translated into English, though.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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New Shouldn't a 1-2-1 code trigger the check engine light? [200][1990]
posted by  EdM.  on Thu Jul 14 07:48 CST 2005 >


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