While discussing EGR systems with a differential pressure feedback EGR (DPFE) sensor, Technician A says the DPFE sensor sends a signal to the PCM in relation to intake manifold pressure. Technician B says the PCM can make corrections to the EGR flow if the actual flow does not match the desired flow. Who is correct? A only B only Both A and B Neither A nor B

While discussing EGR systems with a differential pressure feedback EGR (DPFE) sensor, Technician A says the DPFE sensor sends a signal to the PCM in relation to intake manifold pressure. Technician B says the PCM can make corrections to the EGR flow if the actual flow does not match the desired flow. Who is correct? A only B only Both A and B Neither A nor B

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter33: Emission Control Systems

Section: Chapter Questions

Problem 2ASRQ: While discussing EGR systems with a differential pressure feedback electronic (DPFE) sensor:...

See similar textbooks

Similar questions

While discussing airflow sensors: Technician A says that with mass airflow and volume airflow sensor systems, if any air bypasses the sensors, the engine will run lean. Technician B says that vacuum leaks in a speed density system will decrease injector pulse width. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor B
In the rotameter (gas flow sensor), rotor friction is greatly increased by water condensation and therefore when mounted on a ventilator or anesthesia machine; insertion is recommended in:A) The inspiratory pathway.B) The expiratory route.C) The escape route.D) B and C
Correct the following false statements: 1) For the ultrasonic level sensor, measurement of the frequency of the echo signal allows the liquid level to be inferred.?2) Bourdon tubes are highly sensitive than the Bellows in the lower-pressure range of 0-30 psi.?3) A single-turn pot (350°) has a linearity error of 0.1% and is connected to a 2 Vdc source, so the maximum angle error that could be expected from this system is 0.25o.?
Which of the following is a likely cause of a lean condition during acceleration and cruising speeds? a. A defective oxygen sensor b. A defective PCM c. A defective ECT sensor d. A defective MAF sensor
While discussing EGR systems with a differential pressure feedback electronic (DPFE) sensor: Technician A says that the DPFE sensor sends a signal to the PCM in relation to intake manifold pressure. Technician B says that the PCM corrects the EGR flow if the actual flow does not match the requested flow. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor B
The PCM checks for a closed throttle plate each time the engine starts. This becomes the base for all throttle settings and can be viewed by looking at the PID with the throttle closed. Which of the following would not cause an abnormal reading and a higher-than-normal idle speed? a. A bad TP sensor b. A bad IAC valve c. Loose or worn throttle plates d. Excessive noise in the TP or related circuits
When an engine is running lean, the voltage signal from the oxygen sensor will be (low or high).
Explain the working of NDIR and chemical sensors of exhaust gas analyzers
True or False? On some engines, if the gap between the crankshaft sensor and its trigger wheel is outside specifications, the sensor should be replaced.
True or False? An A/F ratio sensor can be tested in the same way as an oxygen sensor.
Which of the following is the most likely cause of a lean condition during acceleration and cruising speeds? a. A defective oxygen sensor b. A defective PCM c. A defective ECT sensor d. A defective MAF sensor
When testing a frequency varying MAF: Technician A says that the frequency should increase with an increase in engine speed. Technician B says that when observed on a lab scope, the signal from the sensor should be a square wave. Who is correct? Technician A Technician B Both A and B Neither A nor B