P0507 Idle Control System RPM higher than expected P1507 Idle Control System Malfunction (Fail Safe) Anyone know what can cause these codes? I am having a problem during AutoX runs of the engine cutting out in first gear only. It occurs at load around 5000 to 5500 rpm and feels like a fuel cut. These are the only engine codes I am getting. It does not occur in 2nd gear at any rpms or load. Any ideas?
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