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P0591

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P0591 OBD-II Trouble Code: Cruise Control Multi-Function Input "B" Circuit Range/Performance
P0591 code means there is electrical malfunction in the cruise control multi-function input "B" often due too corroded connectors or shorted wiring.

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Question
code p0591 has check engine light on, but car has no crusie control, what else is it on for?
According to my records, the code you are receiving is for a powertrain issue relating to cylinder 4 being out of balance. On diesel engines this can indicate a glow plug issue. This can be related to the fuel composition...

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