What are thermistors used to measure?

What is the voltage range of an STFT oxygen sensor?

Which of these is not a type of speed sensor?

Tech A states that in a PTC sensor, that as temperature goes up resistance goes down. Tech B states that in an NTC sensor, that as temperature goes up resistance goes up. Who is correct?

A fuel injector is often used as an input for the engine control module.

A speed density engine only uses a MAP sensor for measuring amount of air entering engine.

All of the following are inputs EXCEPT_____.

The signal voltage created by a TPS at idle is close to _____

Knock sensors create their own voltage.

What voltage is primarily used as a reference for engine sensors?

In an engine management system, work is done by the actuators, which consist of all of the following EXCEPT:

Tech A says that OBDII will allow a technician to hook up a generic scan tool to read DTC's and clear DTC's. Tech B says that when the MIL is on, the vehicle should not be driven. Who is correct?

Tech A says that analog signals are continuously variable signals. Tech B says that digital signals are direct on/off signals with no in-between transition. Who is correct?

The signal voltage generated by a throttle position sensor rises as the throttle is opened, reaching a maximum reading of almost_____volts.

Which of the following components in the exhaust system helps in the reduction of exhaust emissions?

What is the operating voltage of an LTFT air fuel oxygen sensor?

In what year did it become mandatory for all vehicles to be on-board diagnostic II (OBDII) compliant?

All of these are outputs EXCEPT:

Each of the 10 operating modes of the OBDII system allows for access to different data. Which mode is used to clear DTCs and stored values?

Simple scan tools from the '80s' could read and erase fault codes and little more.

Bi-directional scanners:

Powertrain control module (PCM) A _____ is defined as a lack of combustion.

Tech A says that in modern vehicles, an oxygen sensor is only positioned in the exhaust pipe after the catalytic converter. Tech B says that the oxygen sensor provides the electronic body control module (EBCM) with an electrical signal that relates to the amount of oxygen in the exhaust gas. Who is correct?

The data link connector (DLC) is an 8-pin connector with a common (SAE J1962) size and shape.

Harmful tailpipe emissions include all of these EXCEPT:

A scan tool detects a communications fault in the controller area network bus (CAN-bus). Which of these diagnostic trouble codes (DTCs) would MOST likely be stored?

Which of these pollutants is caused by fuel or oil vapors?

The _____ is hardware related and makes up the physical portion of the PCM

Tech A says that the oxygen sensor is part of the feedback system for the engine management system. Tech B says that long-term fuel trims that are positive means that the PCM is leaning out the fuel mixture from the pulse-width setting. Who is correct?