The Check Engine light with the codeP0171could be caused by a contaminated MAF sensor. Cleaning the sensor usually helps. Blend door actuators could make a buzzing noise in the 2008-2009 Ford Escape hybrid. Failed blend door actuators need to be replaced. A failedthrottle bodyis not uncommon ...
P0116 Error Description Engine Coolant Temperature Circuit Range/Performance Failure Indicates the engine coolant temperature rationality test has failed. The PCM logic that sets this DTC indicates that engine coolant temperature sensor (ECT or CHT) drifted higher than the nominal sensor calibration curve...