Guide To P2235 OBD Error Code Solutions

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You have been noticing that your vehicle isn’t functioning as usual, it maybe time for finding out the reason. A code is usually set in your car when an issue is detected by the Powertrain Control Module (PCM). The P2235 code is set by the PCM when it detects an issue with the heater wire present in the oxygen sensor. The P2235 code is defined as a O2 Sensor Signal Circuit Shorted to Heater Circuit. This may sound complicated, but we will help you understand this problem and also show you how to diagnose and resolve it.

The Oxygen sensor of your vehicle is responsible for measuring the oxygen content in the exhaust gasses which leave the engine after the combustion process is over. This sensor has to be at a specific temperature so that accurate information can be recorded by the oxygen sensor. The oxygen sensor is made up of zirconium dioxide sensing element, which is located in the middle of a vented steel covering. A heater wire is present inside the sensor which helps it reach the temperature desired. There are small platinum electrodes which are soldered between the sensing element, and wire leads of the sensor harness connector. The plugs of the oxygen sensor harness are connected to the Controller Area Network (CAN), this is turn connects the HO2S wiring harness to the connector of the PCM.

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

• There may be defects in the oxygen sensor/s
• Damages like burnt, chafed, broken, may be present with the wiring and/or connectors
• Defective PCM or a programming error of the PCM

1. Powertrain Control Module - It overlooks the functioning of all the modules, and systems in your vehicle. Which in turn helps your car efficiently function. Repair or replace as needed to get rid of the P2235 code.
2. Oxygen Sensor - It performs the task of finding out how much oxygen is present in the exhaust. This sensor is part of the exhaust system, try to repair the problems you have found or replace it with PartsAvatar, avail free shipping on order above CAD $99.
3. Digital Volt Ohm Meter - Is a measuring instrument which is electronic and combines different measurement functions in one unit. If you don’t have one, then buy one to be able to carry out diagnosis.
4. Exhaust System - Contains all the piping that directs exhaust gases away from the combustion of the engine. Try repairing and see if that helps remove the P2235 code. If not you will have to replace it. PartsAvatar ships to the remotest corners of Canada in just few days!
5. Diagnostic Tools - Are all the tools needed to carry out diagnosis and repairs. You can save a tonne of money by being able to diagnose and repair your vehicle instead of going to the mechanic everytime. Order online from PartsAvatar in the comfort of your home and have it reach your doorstep.

We at Parts Avatar Canada care for our customers, and that’s why we will help you to diagnose P2235 code by listing out some major symptoms. They are mentioned below as follows

Common Symptoms

• More than regular amount of fuel is being used in the car
• Engine performance has lowered significantly
• There are misfire codes stored
• The service engine soon light is visible

Learn the ways with which you can correct this trouble code:

• You will have to first try repairing the damages to the PCM otherwise replace it
• First try and repair the exhaust system issues, if that doesn't help then replace it
• Repair or replace the diagnostic tools that aren’t working properly
• Check oxygen sensor for its function after repairing it, if it’s still faulty replace it

Don’t get tensed if you are still facing any of these issues as we care for our customers and that’s why we offer a good range of Pcm, Oxygen Sensor, Digital Volt, Exhaust System and a lot more. We are sure that all your issues would be resolved.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P2235 code to be stored:

To start your diagnosis, you will first need some things like:

1. OBD-II scanner
2. A digital Volt Ohm Meter
3. A vehicle information source
4. Your vehicles matched Technical Service Bulletin (TSB)

Once 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.

Start 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 you find that 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 P2235 Code

• Oxygen sensor is not working
• Powertrain Control Module (PCM) is not functioning properly
• Wiring concerns