P0546 OBD Error Code: Problem & Solutions

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If you find out that the P0546 trouble code is appearing, then it means that there is a malfunction related to the exhaust gas temperature sensor circuit. The main purpose of the sensor is to protect the catalytic converter from heat damage.

The main function of this sensor is to convert the temperature to voltage and input this data to the powertrain control module. Now if the voltage which is being sent to the powertrain control module would start exceeding the limits which have already being set by the vehicle manufacturer, then the P0546 trouble code would be stored in.

The fault code P0546 can be defined as Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1. The P0546 code means that there is some fault in the Exhaust Gas Temperature Sensor (EGT) Circuit High Bank 1 Sensor 1. Alternately, code P0545 may be present, indicating sensor circuit low.

What causes this problem with the Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1?

• An internal or ground short in the EGT sensor
• An aftermarket exhaust system with no EGT provisions
• There can be an exhaust leak upstream of the EGT sensor
• There can be defective or loose terminals or connectors
• Broken or corroded wires which might result in a short to ground
• Some faults in the EGT sensor

1. Air Fuel Ratio Sensor - A faulty Air Fuel Ratio Sensor can be troublesome. You can always rely on us as we have best auto parts for our customers.
2. Engine Control Module - If everything is alright with Air Fuel Ratio Sensor, then there is surely some defect in Engine Control Module. Get it replaced before the situation gets worse.
3. Exhaust Muffler - P0546 code can display due to some issues in the Exhaust Muffler. So, it is very important to replace the Exhaust Muffler with us at equitable prices.
4. Oxygen Sensor - Do you remember when was the last time you got your car Oxygen Sensor checked up? A defective Oxygen Sensor can cause a lot of issues like displaying P0546 code.
5. Powertrain Control Module - Poor Powertrain Control Module can cause a lot of difficulties, so why not get it replaced at time?
6. Catalytic Converter - There can be some issues with the Catalytic Converter due to which you may see P0546 code appearing over and over again. Visit us to buy best quality Catalytic Converter online.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0546 here:

Common Symptoms

• Flashing up of the check engine light

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• First of all, you must clear all codes and ensuring that the code returns when the vehicle is road tested
• Visually inspecting the EGT sensor wiring and connectors and then you can always replace them if found faulty
• Carefully inspect the sensor resistance and replace it if it is below 50 ohms
• Make sure to replace the defective PCM (powertrain control module) or ECM (engine control module)

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Here are some steps which you should follow in order to diagnose this fault code:

• Clear all the codes, and then road test the vehicle and check if it comes back
• Visually inspect the exhaust gas temperature sensor and relevant circuitry, focusing in particular on areas that may be in contact with hot components
• Then the next step would be to inspect the connectors for corrosion or loose connections
• Check wires for missing insulation or other damage that could cause a short to ground
• Checking the EGT sensor resistance using an ohmmeter to ensure it has around 150 ohms
• Use a heat gun or hair dryer to heat the sensor while observing the ohmmeter to ensure that the resistance is dropping as the sensor heats up, and rising as it cools down
• Testing the voltage on the engine end of the pigtail to ensure that there are five volts at this connector

Common Mistakes When Diagnosing The P0546 Code

• Sometimes the oxygen sensor can be mistaken for the EGT sensor. Both of them are different in appearance however, with the EGT sensor being simply a two-wire plug. It is situated between the exhaust manifold and the catalytic converter
• Replacing the oxygen sensor would not correct this issue as it is very important to recognize the correct sensor which is faulty