Guide To P2489 OBD Error Code Solutions

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P2489 is an OBD-II generic code for the exhaust gas temperature sensor circuit signal is intermittent for bank 2 sensor 5 to the engine control module (ECM). This means the sensor signal voltage signal return is intermittent within specification. Thus, an erratic performance from the sensor 5 of bank 2 will cause OBD code P2489 getting stored in the powertrain control module (PCM).

Exhaust gas temperature sensors work to measure the engine temperature which can go as high as 900 degrees Fahrenheit. As the exhaust temperature changes, this part senses it and makes the necessary adjustments. As the temperature increases, resistance is decreased by the sensors. Issues like excessive engine temperatures, vehicle fluid contamination and severe vibration can all cause exhaust gas temperature sensors to become faulty. When this occurs, it can cause symptoms like an illuminated check engine light, engine knock or ping and failing the emissions test. Prompt replacement is important to protect the engine against further damage. If this part is not working properly, the engine is at risk for failure.

What causes this problem with the Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 5?

• Failed Bank 2 Sensor 5 EGT sensor
• Short/open wiring problem
• High resistance and poor electrical connections
• ECU (Engine Control Unit) error

1. Engine Control Module - Want to know the most common reason behind the failure in the engine control module? Corrosion or damage because of moisture can cause ECM failure. Corrosion might enter the ECM through the wiring harness and moisture can enter by a failure in the seals in the ECM itself.
2. Engine Wiring Harness - Your car ECM would not operate properly if there are some cracks or break in the engine wiring harness. Corrosion as well as physical damage are the most common reasons why you should replace an engine wiring harness. Purchase high grade engine wiring harness online from Parts Avatar Canada.
3. Oxygen Sensor - The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. Thus, replace faulty O2 sensor now!
4. Powertrain Control Module - The PCM makes the engine and transmission work in tandem. Any issue with the powertrain control module will cause major problems with the efficient running of the vehicle.
5. Fuel Injector - The fuel injectors are important component of the fuel delivery system that helps in proper utilization of the fuel entering the engine. This not only helps in taking care of the air to fuel ratios in the engine, helping the combustion process but also enhances the performance. Thus, replace faulty injector now!
6. Electronic Control Unit - If your vehicle fails to start for no apparent reason, this is also a good indicator that there can be some issues with the ECU. If you check the car battery, starter and other common electrical components, and the vehicle still does not start, a quirky electronic control unit should be the next logical thing to consider.
7. Diagnostic Tool - In order to fix these errors, you need few diagnostic tools to get your car problems pointed out easily. Our diagnostic tools collection will come handy to do so and resolve all your vehicle problems. Visit today!
8. EGR Valve & Parts - Check for bad EGR system and parts that hamper the engine performance and can cause engine stalling and not starting along with rough engine idles. Replace faulty components now!
9. Exhaust Gas Temperature Sensor - A faulty EGR temperature sensor will disturb the flow of the EGR system causing the cylinder temperature to increase. This increase in temperature produces a weird sound which can be heard near the engine bay. If you hear such noise, it means that there is some problem with the combustion process and it should be fixed right away. Delaying the problem for too long can cause complete engine failure.
10. Diesel Exhaust Fluid Pump - The DEF Pump creates hydraulic pressure to transfer the DEF from the tank to the injector. If DEF pump fails to operate properly, code P2489 will set. Thus, replace it now!

Willing to know some common symptoms of OBD Code P2489? Your wish is our demand. Have a look at them below:

Common Symptoms

• Excessive black smoke upon acceleration
• Illuminated service engine soon lamp
• A stored trouble code.

We have listed out some ways which would help you to correct the occurrence of OBD Code P2489. They are mentioned here as follows:

• Replace Bank 2 sensor 5 EGT sensor
• Repair/replace open or short in the wiring and connections
• Bank 2 Sensor 5 fuse replacement
• Replacement of PCM/ECM

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

• Install a scan tool in vehicles OBD-II port to check if P2489 is present or not.
• Freeze frame data and test drive to check if the code reappears under same conditions.
• If the Check Engine Light returns upon test, then the code is confirmed.
• Search technical service bulletins (TSB) in your vehicle information source. If you find one that matches the symptoms and code/s presented by the vehicle in question, it will very likely aid you in your diagnosis. TSB listings are compiled from thousands of successful repairs.
• Performs a visual inspection of wiring and bank 2 sensor 5 for any damage, breaks, or shorted wiring.
• If the wiring is okay, the sensor itself will be tested to confirm operation. Check for the voltage of Bank 2 sensor 5 and make sure it is not excessively low or high. If low or high voltage is confirmed, bank 2 sensor 5 is faulty and must be replaced.
• A diagnostic of the ECU (Engine Control Unit) will be performed, if the voltage is not low or high and sensors are fine.

Common Mistakes When Diagnosing the P2489 Code

• Clearing ECM memory codes before checking the freeze frame data of the failure
• Failing to clear ECM codes after the P2489 codes are fixed
• Replacing the sensor when the connector has corrosion in the connections