A Vehicle Is Brought in for Repair with the Complaint

Multiple Choice

A vehicle is brought in for repair with the complaint of poor fuel economy. A diagnostic scan tool is attached to the DLC with the vehicle at operating temperature, and the technician determines that the precatalyst oxygen sensor voltage is biased high, the injector pulse width is long, and both STFT and LTFT are high. All of the following conditions could cause this EXCEPT:

A) high fuel pressure
B) open coolant temperature sensor circuit
C) TP sensor voltage fixed high
D) MAP sensor output indicates high load condition