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International Automotive Technicians Network
Re: 01 P$D Low Idle only Below 30 degrees IAT
Posted to HD/Fleet Forum on 2/15/2003

If the complaint is the engine does not go into cold ambient protection mode (high idle) until it has idled for two minutes, then there is nothing wrong. The CAP doesn't kick in until after 130 seconds of idle when the engine oil is below 70 degrees. How high ... Login to read more.