What is P0713 Fault-Error Code?
P0713 Fault-Error Code is a diagnostic trouble code (DTC) in the vehicles' On-Board Diagnostics II (OBD-II) system. Specifically, it indicates a problem with the Transmission Fluid Temperature (TFT) sensor circuit, commonly referred to as "Transmission Fluid Temperature Sensor Circuit High Input".
When this code appears, it usually means that the engine control module (ECM) or transmission control module (TCM) has detected a high voltage signal from the transmission fluid temperature (TFT) sensor. The TFT sensor measures the temperature of the transmission fluid and sends this information to the ECM or TCM.
What are the symptoms of P0713 Fault/Error Code?
When a P0713 malfunction/error code is detected, various symptoms or indicators may occur. These indications may include:
Engine Malfunction Light Turning On: The most common and noticeable indicator of the P0713 fault code is the check engine light on the vehicle's instrument panel turning on. The CEL illuminates when the engine control module (ECM) or transmission control module (TCM) detects a malfunction with the transmission fluid temperature sensor circuit.
Transmission Overheat Warning: Some vehicles may have a special warning light or message that indicates the transmission is overheating. A high input signal from the TFT sensor circuit can trigger this warning and alert the driver to a possible problem with the transmission oil temperature.
Transmission Shift Problems: Erratic or abnormal shifting behavior may occur due to inaccurate transmission fluid temperature readings. The transmission may delay shifting, shift harshly, or fail to engage certain gears properly.
Transmission Skip: A faulty TFT sensor circuit can cause transmission slippage when the transmission is unable to properly maintain power and acceleration, especially under load or during acceleration.
Reduced Fuel Efficiency: In some cases, a high input signal from the TFT sensor circuit can affect the transmission's ability to operate efficiently, resulting in decreased fuel efficiency over time.
Engine Overheating: Although less common, inaccurate transmission oil temperature readings can also affect engine cooling. If the engine control module (ECM) relies on transmission fluid temperature data for cooling system management, an incorrect signal from the TFT sensor circuit can affect engine temperature regulation.
Other Transmission-Related Problems: Depending on the severity of the problem and the vehicle's specific transmission system, other transmission-related symptoms may occur, such as abnormal noises, rough shifting, or transmission hesitation.
What could be the reasons for the P0713 Fault/Error Code?
P0713 malfunction/error code, several possible causes can trigger this error code, including:
Defective Transmission Fluid Temperature (TFT) Sensor: A defective TFT sensor is one of the most common causes of code P0713. The sensor may have internal electronic problems, wear, damage, or poor connection, causing it to produce a high voltage signal.
Wiring Issues: Damage, corrosion, or poor connections in the wiring harness associated with the TFT sensor circuit can cause the voltage signal to be higher than expected. This may include shorts to voltage, damaged wiring, or loose connections.
Transmission Fluid Overheating: Overheating of the actual transmission fluid can cause the TFT sensor to produce a high voltage signal. Overheating can occur due to low fluid levels, poor fluid condition, or operating the vehicle under heavy loads or towing conditions.
Faulty ECM or TCM: In rare cases, a fault in the engine control module (ECM) or transmission control module (TCM) may be responsible for code P0713. However, this is less common than problems with the TFT sensor or cabling.
Other Electrical Problems: Other electrical problems such as a short or open circuit in the vehicle's wiring system can potentially cause the voltage signal to be higher than expected.
What Steps Should Be Followed to Resolve the P0713 Fault/Error Code?
To resolve fault/error code P0713, you must take a systematic approach to diagnose and repair the underlying problem. Here are the steps you need to follow:
Read the Code: Use an OBD-II scanner to retrieve trouble code P0713 and other related codes stored in the vehicle's engine control module (ECM) or transmission control module (TCM). Make a note of any existing codes as they may provide additional information about the problem.
Check Transmission Fluid Level: Check the transmission fluid level and condition. Make sure the fluid level is within the recommended range specified in the vehicle's service manual and that the fluid is clean and not contaminated.
Inspect TFT Sensor and Wiring: Locate the Transmission Fluid Temperature (TFT) sensor and check for any signs of damage or corrosion. Check the wiring harness associated with the TFT sensor for any damage, breaks, or loose connections.
Test TFT Sensor Voltage: Use a multimeter to test the voltage output of the TFT sensor with the engine running and the transmission in gear. Compare the measured voltage readings with the specifications stated in the vehicle's service manual.
Check ECM/TCM Communications: Use diagnostic tools to scan the ECM and TCM for any internal malfunctions or communication issues with the TFT sensor circuit. Make sure the modules receive and transmit signals correctly.
Repair or Replace Faulty Components: Depending on your diagnosis, repair or replace faulty components detected during the inspection, such as the TFT sensor, wiring harness, or connectors.
Clear Codes and Test Drive: After completing repairs, clear fault codes stored in the ECM or TCM using the OBD-II scanner. Take the vehicle for a test drive to make sure code P0713 does not return and the transmission is working properly.
Recurrence Monitoring: Pay attention to the vehicle's performance and check if the P0713 fault code recurs. If the code returns, recheck all components and cables to identify any overlooked problems.
What are the Long-Term Effects of the P0713 Fault/Error Code?
The long-term effects of fault/error code P0713 are:
Transmission Damage: A faulty TFT sensor can cause an inaccurate transmission oil temperature reading. This can cause improper transmission operation, including delayed or rough shifting, which can accelerate wear and tear on transmission components over time. Prolonged operation with incorrect fluid temperatures can contribute to premature transmission failure.
Conduction Overheating: Incorrect TFT sensor readings may result in actual transmission overheating not being detected. Over time, prolonged transmission overheating can damage internal components, causing transmission failure.
Reduced Fuel Efficiency: A high input signal from the TFT sensor circuit can affect the transmission's ability to operate efficiently, resulting in decreased fuel efficiency over time due to inadequate transmission performance.
Transmission Skip: A faulty TFT sensor circuit can cause transmission slippage when the transmission is unable to properly maintain power and acceleration, especially under load or during acceleration.
Safety Concerns: Defective transmission components, such as the TFT sensor, can compromise the drivability and safety of the vehicle. Erratic shifting, delayed engagement, or other transmission-related issues can affect vehicle handling and response, potentially leading to unsafe driving conditions.
Increased Repair Costs: Ignoring or delaying repairs for a P0713 fault code can lead to more significant transmission problems over time, resulting in higher repair costs. Addressing the problem immediately can help prevent further damage and reduce overall repair costs.
Overall, it is very important to address a P0713 fault code immediately to prevent possible long-term effects on the vehicle's transmission, drivability, fuel efficiency and safety. Ignoring the problem or delaying repairs can lead to more significant problems and higher repair costs in the future. If you encounter trouble code P0713, it is recommended that the vehicle be diagnosed and repaired by a qualified mechanic or automotive technician as soon as possible.
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