What is the P0545 fault codes? What is the Exhaust Gastemperature (EGT), Sensor Circuit Low (Bank 1, Sensit 1) description? How do I fix the P0545 fault code What are the symptoms and causes for the P0545 fault code

What is the P0545 fault code? What does it mean

A P0545 code indicates that the powertrain controller module (PCM), has detected an error in the exhaust gas temperature sensor circuit. Fault code P0545 is triggered when the voltage signal from the exhaust temperature sensor to the computerM is lower that the manufacturer’s minimum parameters. The check engine light will also be illuminated.

“Bank 1” The code description refers only to the engine row that is connected with cylinder 1. “Sensor 1” Refers to the “up” EGT sensor placed in front the catalytic conversion. The EGT sensor is located between gasoline vehicles’ exhaust manifolds and the catalytic convert in diesel vehicles. It is usually near the turbo exhaust inlet for turbo vehicles.

As the name implies, the EGT sensor measures the exhaust gas temperature to protect the catalytic convert from excess heat. It is found in the majority of new gasoline and diesel engines. It is made up of a heat-sensitive resistor that transmits exhaust heat to the PCM and converts it to an electrical voltage. There are usually two cables. One wire is used as ground, the other to receive the 5 volt reference from the PCM. Grounding resistance decreases as exhaust gas temperature rises, while the voltage signal goes up. The PCM will adjust the engine timing or fuel ratio if it detects an excessive voltage signal from the exhaust temperature sensor. This is done to restore the catalytic converter to an acceptable range. Diesel vehicles can also use data from the EGT sensor to determine DPF regeneration.

The P0545 fault code can affect vehicles of all makes and models, including but not limited to: Nissan, Dacia, Volkswagen Jeep, Dodge, Renault Mercedes-Benz, Vauxhall Hyundai, Opel, Chevrolet, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Mercedes-Benz, Opel, Hyundai, Opel.

What causes the P0545 Fault code?

These are the most common reasons that P0545 fault codes are triggered:

  • – Broken, damaged, melted, or corroded wires, and/or loose, corrosioned connectors to EGT sensor
  • – Short circuit in ground cable from EGT sensor and PCM
  • Pressure problems can be caused by improper exhaust application, sub-industry use or poor quality components
  • – Excessive exhaust leakage at the sensor’s intake
  • – Defective EGT sensor (Bank 1, Sensor 1)

 

What are the symptoms for P0545 fault code?

You may experience the following symptoms if your vehicle has the code P0545:

  • – Turn on the engine light (often without other symptoms).

 

How to Fix the P0545 Fault Code

Inspecting the exhaust gas temperature sensor, and all its circuits, is the first step. The sensor should not be disengaged unless there are no damages to its wires or connectors. A digital ohmmeter can check the resistance of the sensor. An EGT sensor that is properly working will have resistance of approximately 150 ohms. Replace the sensor if the resistance falls below 50 ohms.

The sensor can be heated with a hair dryer, heat gun, or heat gun. An ohmmeter will monitor the temperature. As the sensor heats up, its resistance should decrease and then increase as it cools down. The sensor should be replaced if it shows signs of abnormality.

This is the biggest mistake in repairing the code. The wrong step of replacing the oxygen sensor will not fix the malfunction code.

These are some of the possible repairs that could resolve the P0545 fault code:

  • Repair or replacement for damaged, melted or corroded open or short-circuit cables and connectors to EGT sensors
  • Repairing ground wire issues in EGT sensors
  • – Test and replacement of the EGT sensor if necessary
  • Repair of exhaust system leaks
  • – Reprogramming or replacement of a faulty PCM

 

How Serious Is the P0545 Fault Code

While P0545 will not affect vehicle operation or prevent safe operation, it could cause voltage and electrical problems since the PCM relies upon the sensor to perform optimal functions. The code can cause exhaust system overheating and damage to the catalytic converter if it is not followed. This can lead to higher repair costs.

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