Guide To P046B OBD Error Code Solutions

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OBD error code P046B is a generic OBD error code that indicates some malfunctioning with the catalyst temperature sensor ½ correlation, bank 2. To know more about this generic error code P046B, you will need to go through our subsequent sections. We have listed out few common causes and symptoms related to this error code, along with the ways and means to diagnose and correct it.

OBD error code will be set by your vehicle’s powertrain control module when it detects that there are some issues with functioning of the vehicle’s catalyst temperature sensor bank 2. Vehicle’s powertrain control module is responsible for monitoring the catalyst temperature sensors and it also compares the signals from the two sensors. If the PCM detects that the amount of variation between the two is not as requires or in other words it is out of the programmed amount. In these circumstances PCM will set OBD error code P046B.

What causes this problem with the Catalyst Temperature Sensor 1/2 Correlation (Bank 2)?

• Malfunctioning catalyst temperature sensor
• Problems with harnesses such as they might be open or shorted
• Electrical problems such as low electrical connection
• Problems with the cat converters
• Problems with the DEF system of your vehicle
• Issues with the powertrain control module

1. Catalyst Temperature Sensor - Having problems with your catalyst temperature sensor can really escalate your problem with the error code P046B. So, we definitely recommend you to stop thinking and replace your damaged or faulty parts today.
2. Catalyst Temperature Sensor Harness - if you are facing OBD error code P046B then it might demand a new catalyst temperature sensor harnesses if found faulty. If you wish to get it done at the earliest then you can simply browse through our website to find one for your make and model.
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6. Powertrain Control Module - There is a possibility that if you are facing OBD error code P046B your PCM itself might be damaged and is demanding for a quick change. So, what are you waiting for? Buy a new one with us now.
7. Diagnostic Scanner - If you wish to be that DIY guy and in order to detect and diagnose all the obd error code, you will need diagnostic scanners. So, what are you waiting? Dig into the world of diagnostic tools with PartsAvatar.
8. Infrared Thermometer - Well, in order to detect and diagnose all the obd error code P046B, you might need infrared thermometers to diagnose this error code efficiently.
9. Multimeter - If you need any of the DIY diagnostic tools such as multimeter, to diagnose the issues with your cars. You can find them all with us.

If you are facing OBD error code P046B, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• Appearance of DEF system codes
• Excessive exhaust emissions
• Appearance of cat converter codes
• Fall in fuel efficiency
• Flashing of check engine light

In order to correct this OBD Code P046B you will need to undergo the following steps and might need the following parts.

• Repair or replace the broken or shorted catalyst temperature sensors wirings and harnesses
• Repair or replace the faulty cat converters and related damaged parts

If you continue to face these problems and need parts to fix it you can find them with us. We have stocked a wide range of best priced ECM, PCM, catalyst temperature sensor and a lot more to help you out in fixing your car.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P046B code to be stored:

In order to diagnose this error code P046B, you will need few tools such as diagnostic scanner, digital volt/ohmmeter also known as DVOM and infrared thermometer. Once you get all these tools ready just make sure that you have installed the right fluids in the DEF system and it is working well. Check for DEF related codes and if you come across any, then make sure you actually get rid of them before you attempt to fix error code P046B. Also, make sure that you inspect the exhaust cat converters and all the wires and harnesses that are mounted near the exhaust pipes and manifolds. Now, connect the scanner to the diagnostic port of your vehicle and restore all the related codes and freeze the codes. Next, clear all the codes and check if P046B reappears. In case the code resets itself, then check for the temperature variations and compare them with the desired data. If there exists a difference between the two sensors and is not working within specifications, use the infrared thermometer to get a physical temperature. Compare your findings with those seen on the scanner data display and test exhaust temperature sensors which do not align.

Lastly, make use of the DVOM to test the individual sensors as per the manufacturer’s recommendations. Now change all the sensors which do not fit the specifications. Also test individual circuits in case all the sensors are perfect. Fix the circuits which do not fit into the manufacturer’s specifications.

P046A - Catalyst Temperature Sensor 1/2 Correlation (Bank 1)