Pcm Code E066, Engine Rpm Too High W/Cruise Engaged: Description

PCM Code E066 will set when engine speed is greater than 4800 RPM with cruise engaged. This may occur on slippery pavement, extended wide open throttle acceleration or for some mechanical problems (such as transmission slippage). Under these conditions, PCM Code E066 is normal. Vehicle operator should be advised why cruise control de-energized. Clear code, and road test vehicle to verify normal operation.