P2236 - OBD Trouble Code

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The P2236 code is defined as a O2 Sensor Signal Circuit Shorted to Heater Circuit. The job of the oxygen sensor is to measure the oxygen present in the exhaust gasses once they have been sent out of the engine. In order to perform efficiently, the oxygen sensor has to be at a specific temperature, and for it to reach that temperature a heater wire is present inside it. This wire helps it reach the correct temperature quickly too. If the PCM is able to detect any problem with the heater wire it will set the P2236 code.

The oxygen sensors of the vehicle has made using an element that helps sense zirconium dioxide. This is situated in the middle of the vented steel case. Within the oxygen sensor harness, there are small platinum electrodes present between the sensing element and wire leads. The Control Area Network is attached to the PCM connector. The O2 sensor harness is plugged into the CAN. This helps in information to be transferred quickly.

What causes this problem with the O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3?

• A flaw in the oxygen sensor/s
• The wiring and/or connectors are burnt, chafed, broken, or disconnected
• Defective PCM or a PCM programming error is present

1. Powertrain Control Module - The PCM is responsible for making sure that the functioning of all the modules, and systems in your vehicle is smooth. This results in your car functioning efficiently. Repair or replace as needed to get rid of the P2236 code.
2. Oxygen Sensor - It records how much oxygen is present in the exhaust. This sensor is part of the exhaust system, repair the problems you have found otherwise replacing it will be the only option to remove the P2236 code which is set. With PartsAvatar you can avail free shipping on order costing above CAD $99.
3. Digital Volt Ohm Meter - Is an electronic measuring instrument which combines different measurement functions in one unit. Having one can help in several diagnostic procedures.
4. Exhaust System - This system contains all the piping that directs exhaust gases away from the combustion of the engine. You can try repairing and see if it helps in removing the OBD-II error code P2236. The other option would be to replace the whole system or the components that are beyond repair. Order online and don’t worry, PartsAvatar ships to the remotest corners of Canada in just few days!
5. Diagnostic Tools - These are all the tools needed for diagnosis and repairs. Save money by diagnosing and repair your vehicle on your own with the help of these tools. Order from the comfort of your home today and have it reach your doorstep.

If you are facing OBD error code P2236, 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

• Reduction in fuel productivity
• Reduced engine performance
• Stored codes related to engine misfire or lean/rich exhaust
• Service engine soon light is on

It is very important to fix the fault code P2236. So here are some ways with which you can correct this issue:

• Replacement of the damaged Oxygen Sensor
• Repairs or replacement of the damaged components within the exhaust system
• Repair or replace the problematic PCM

However, if you face any issue then we have stocked a wide range of best priced PCM, Oxygen Sensor, Digital Volt, Exhaust System and more to help you out in fixing your car.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• To start your diagnosis, you will first need some things like: OBD-II scanner, digital Volt Ohm Meter, vehicle information source, your vehicles matched Technical Service Bulletin (TSB).
• After you have them all with you, start by connecting your scanner to the diagnostic port and retrieve all the stored codes. Freeze frame the data and also make note of them and then proceed to clearing them.
• Once they’re cleared go for a test drive and see if the P2235 code is immediately reset or if the vehicle enters readiness mode. In the case of latter, you may be having an intermittent condition.
• Perform a visual inspection of the wiring, connectors and other electrical components related to the Hydrogen sensor. To be able to accurately locate it, make use of the vehicle information source or the TSB. You will find all the important information like connector face views, pinout charts, wiring diagrams etc. It is very important that you match the TSB accurately to your vehicles, make, model, year of manufacture and engine.
• Upon inspection if you come across any damaged wiring or connectors or circuitry, you will have to repair or replace it as needed. Once you’re done clear the code and go on another test drive, if the P2235 code sets again then you will have to continue your diagnosis.
• On the engine, and reach normal operating temperature and idle. Now connect the scanner again and note the oxygen sensor input data displayed on the data stream. You can narrow down the scope of the data stream to include only necessary information, this will make the process faster for you.
• If the oxygen sensors are functioning fine, then the voltage on the pre-cat oxygen sensors will range between 1 and 900-millivolts when the PCM is in closed loop operation. The post-cat sensors also will be in the same range; however they will slow down after a point and remain stable when compared to the pre-cat sensors. HO2S which are not able to cycle properly will have to be considered defective, if the engine is in good condition.
• A low battery voltage or no voltage displayed by the HO2S on the data stream of the scanner may be displayed. In such a case using the DVOM get live data on the HO2S connector. If the output data is the same then there is most likely an internal short in the HO2S. In such a case replacement will be mandatory.

Common Mistakes When Diagnosing the P2236 Code

• Failure of the Oxygen sensor
• Malfunctioning Powertrain Control Module (PCM)
• Problematic wiring and connectors