What is OBD-II Code P2805 – Transmission Range Sensor A/B Correlation


What is OBD-II Code P2805 – Transmission Range Sensor A/B Correlation?

When your vehicle’s check engine light comes on, it can be a signal of multiple issues with the car. Fortunately, the car’s onboard diagnostic (OBD) system will generate a code to help you understand the problem. One such code is OBD-II code P2805. The P2805 code pertains to the transmission’s range sensor A/B correlation.

The transmission range sensor is responsible for indicating to the transmission control module (TCM) and engine control module (ECM) the position of the gear selector lever. The TCM uses this information to determine when to shift gears, and if there is a problem with the transmission range sensor, it can cause issues with shifting and transmission performance.

Symptoms of OBD-II Code P2805

The symptoms of OBD-II code P2805 can vary depending on the make and model of your vehicle. However, some common symptoms of this code include:

1. The check engine light turning on
2. Transmission shifting issues
3. Inaccurate readings on the transmission gear display
4. Difficulty starting the vehicle
5. Stalling when the vehicle comes to a stop

Causes of OBD-II Code P2805

OBD-II code P2805 is commonly caused by a faulty transmission range sensor, which can occur due to several reasons:

1. Worn-out or damaged transmission range sensor: When the transmission range sensor gets worn out or damaged, it can cause problems with shifting gears and performance.

2. Loose or corroded wiring: Loose or corroded wiring in the transmission range sensor circuit can cause poor connection, causing the transmission control module to receive inaccurate readings from the sensor.

3. Bad electrical connection: A bad electrical connection between the transmission range sensor and the transmission control module can cause the transmission control module to receive wrong or skewed readings from the sensor.

4. Faulty transmission control module: A faulty transmission control module can also cause OBD-II code P2805.

How to Fix OBD-II Code P2805

If you notice any of the symptoms of OBD-II code P2805 or suspect any issues with the transmission range sensor, it’s imperative to address the issue immediately before any further damage happens.

There are a few things you can do to fix the issue:

1. Inspect the transmission range sensor: Using a digital multimeter, check the resistance of the sensor. If the sensor’s resistance is not within specifications, the sensor needs replacement.

2. Inspect the wiring connections: Inspect the wiring connections from the transmission range sensor to the transmission control module. If you notice any loose or corroded connections, repair or replace the wiring.

3. Replace the transmission control module: If you have tested the transmission range sensor, replaced any wiring, and the issue persists, replacing the transmission control module may be necessary.

4. Consult a professional mechanic: If you’re having difficulty resolving the issue or want to make sure it’s done correctly, you can take your car to a professional mechanic to diagnose and repair the problem.

FAQs

1. Can I still drive my car with OBD-II code P2805?
It is not recommended to drive the car when it has the check engine light on. This code is related to the transmission range sensor, which can cause transmission issues. It’s best to address the issue immediately to prevent further damage.

2. How do I reset the check engine light on my car?
You can reset the check engine light on your car by using a diagnostic tool. However, it’s important to address the issue causing the check engine light to turn on before clearing the code.

3. How often should I have my car’s transmission serviced?
The recommended service intervals for a transmission vary between makes and models. Refer to your vehicle’s owner’s manual for the manufacturer’s recommendation.

4. Can a faulty transmission range sensor cause the check engine light to turn on?
Yes, a faulty transmission range sensor can cause the check engine light to turn on.

5. How much does it cost to fix OBD-II code P2805?
The cost of fixing OBD-II code P2805 varies depending on the make and model of your vehicle and the scope of the problem. It can range from a few hundred dollars up to a thousand dollars. It’s best to consult with a professional mechanic for an accurate estimate.

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