Understanding diagnostic trouble codes

What happens to the voltage in a two-wire sensor circuit when an open circuit occurs?

• The voltage fluctuates randomly.

• The voltage drops to zero.

• The voltage remains constant.

• The voltage rises to five volts.

How does high resistance in a circuit affect the monitored voltage?

• It causes the voltage to rise above 4.8 volts.

• It causes the voltage to fluctuate wildly.

• It causes the voltage to drop below 0.2 volts.

• It causes the voltage to remain stable.

What is the result of a short to voltage in a sensor circuit?

• The signal voltage drops to zero.

• The signal voltage goes to the shorted voltage level.

• The signal voltage remains unchanged.

• The signal voltage becomes erratic.

What DTC is set when a signal wire is shorted to ground?

• Sensor performance fault.

• Sensor circuit open.

• Sensor signal circuit voltage too low.

• Sensor voltage too high.

What characterizes a signal performance fault?

• The signal voltage drops to zero.

• The signal voltage goes outside the normal range.

• The signal voltage remains constant.

• The signal voltage behaves unusually within the normal range.