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No, a check engine light only relates to the running of the engine itself. The accessories do not affect it unless you cut into the wiring or add an overpowering stereo system or add on an aftermarket performance item that is not in balance with the entire system. Your A/C unit should not affect your cars air or fuel ratio just because it is low on Freon.
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1991 FORMULA 350-GONE BUT NOT FORGOTTEN
1 of 1,197 with L98 Option/13.79@100 mph
1994 25th ANNIVERSARY TRANS AM GT -1 of ONLY 2,000 made/ Only 128 made with a HURST 6-Speed Manual and 91 with T-Tops and Compact Disc/ K & N Filtercharger/Magnaflow Performance Muffler/Air Foil- ORIGINAL MINT Arctic White Ultra Rare SURVIVOR. DAYTONA 500 PACE CAR Decal Kit!
SOLD: 1989 Turbo T/A in 1991 it ran 12:18@115 mph
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