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Re: check eng lite on H.D. chev van chasiss 5.7l non-feed back
Posted to Emissions Forum on 7/13/2000 1 Reply

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The CEL is there to indicate any problems in the A.I.R. system. The light is turned on by a CEL relay. The light will come on when an air management valve fails(there may be two of them), temp sensor ... Login to read more.

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