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check engine light-SAS 850 1997

posted by  V70BB on  Sat Mar 12 04:27 CST 2005
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Bill,

Post your codes here. Could be a bad SAS valve again, but might also be a faulty relay, or something else.

Fuel trim is disabled during cold startup, in order to aid the car in getting up to temperature. The air pump system is part of that inasmuchas it helps speed the heating of the catalytic converter during startup, so that the "cat" can take care of emissions related to disabled fuel trim.

In short, the air pump system (PAIR) is part of the emissions control of the car.

BB






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