P2743 Fault Code

Transmission Fluid Temperature Sensor B Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2743 fault code indicates a problem with the Transmission Fluid Temperature Sensor B Circuit, specifically highlighting a high voltage or signal issue. This sensor is crucial for monitoring the temperature of the transmission fluid, ensuring optimal performance and preventing overheating. When this fault code is triggered, it may lead to various transmission issues or decreased efficiency.

What are the symptoms of the P2743 code?

Common symptoms associated with the P2743 code may include:

• Erratic shifting or difficulty shifting gears.
• Overheating transmission fluid, leading to poor vehicle performance.
• Warning lights on the dashboard, such as the check engine light.
• Increased fuel consumption due to compromised transmission efficiency.

What causes the P2743 code?

Possible causes for the P2743 code include:

• Faulty transmission fluid temperature sensor.
• Damaged wiring or connectors in the sensor circuit.
• Short circuits or open circuits in the wiring.
• Poor electrical connections, such as corrosion or wear.
• Issues with the engine control unit (ECU) that processes the sensor's signal.

How to fix P2743?

To resolve the P2743 fault code, follow these steps:

1. Inspect the transmission fluid temperature sensor for any signs of damage or faultiness.
2. Check the wiring and connectors for any signs of corrosion, damage, or loose connections.
3. Test the sensor's functionality using a multimeter to ensure it's operating within the specified voltage range.
4. Replace the sensor if it is found to be defective.
5. Clear the fault code from the ECU and perform a test drive to confirm that the issue is resolved.