The P0713 trouble code is an OBD-II diagnostic code that indicates a problem with the transmission fluid temperature (TFT) sensor circuit. Specifically, it signifies that the powertrain control module (PCM) has detected a high input signal from the TFT sensor, which typically suggests that the automatic transmission fluid is overheating. This issue can lead to various performance problems in the vehicle, including harsh shifting, reduced power, and potentially severe transmission damage if not addressed promptly.
| P0713 Code Meaning | P0713 Code Common Causes |
|---|---|
| Transmission Fluid Temperature Sensor Circuit High Input | Faulty transmission fluid temperature sensor |
| Indicates overheating of automatic transmission fluid | Wiring issues or short circuits in the TFT sensor circuit |
| Potential transmission control module (TCM) malfunction | Low or dirty transmission fluid levels |
| Can trigger limp mode in the vehicle | Faulty PCM (Powertrain Control Module) |
Symptoms of P0713 Code
When the P0713 code is triggered, vehicle owners may notice several symptoms that can affect driving performance. These symptoms include:
- Illuminated Check Engine Light: The most common indication of any trouble code being present.
- Harsh or Delayed Shifts: The transmission may struggle to shift smoothly between gears, leading to a jerky or delayed response.
- Limp Mode Activation: The vehicle may enter a protective mode to prevent further damage, limiting engine power and speed.
- Irregular Torque Converter Clutch Operation: The torque converter may not engage or disengage properly, affecting acceleration and fuel efficiency.
Technical Explanation of P0713 Code
The P0713 code relates to the TFT sensor, which is crucial for monitoring the temperature of the automatic transmission fluid. This sensor helps determine optimal shift points and line pressure within the transmission, ensuring smooth operation.
The TFT sensor operates as a negative temperature coefficient (NTC) thermistor, meaning its resistance decreases as temperature rises. When the transmission fluid gets too hot, the voltage signal sent to the PCM becomes higher than expected, triggering the P0713 code.
Common causes for this high input signal can include:
- A faulty TFT sensor that inaccurately reads high temperatures.
- Wiring issues such as shorts or open circuits that affect signal integrity.
- Low or contaminated transmission fluid that fails to cool effectively.
Step-by-Step Diagnosis of P0713 Code
Diagnosing the P0713 code requires a systematic approach. Here’s a step-by-step method for DIY mechanics:
1. Visual Inspection
Begin with a thorough visual inspection of the transmission area:
- Check for any visible damage to the TFT sensor and wiring harness.
- Look for signs of fluid leaks around the transmission pan and seals.
2. Scan Tool Analysis
Use an OBD-II scanner to retrieve diagnostic trouble codes:
- Confirm that P0713 is present and check for any related codes (e.g., P0710, P0711).
3. TFT Sensor Testing
To test the TFT sensor:
- Disconnect it from its connector.
- Use a digital multimeter set to ohms to measure resistance across the terminals while monitoring engine temperature.
If resistance does not decrease as temperature increases, replace the TFT sensor.
4. Circuit Testing
If the TFT sensor appears functional:
- Check for reference voltage at the sensor connector with a multimeter set to volts.
- If no voltage is detected, trace back to the PCM and check for open circuits.
5. Fluid Level and Condition Check
Inspect transmission fluid levels:
- Ensure fluid is at recommended levels; low fluid can cause overheating.
- Check fluid condition; if it appears dark or burnt, consider replacing it.
Solution Methods for P0713 Code
Once diagnosed, several solutions can address the P0713 code effectively:
Replace Faulty Components
If testing reveals a faulty TFT sensor or damaged wiring:
- Replace the TFT Sensor: This usually involves draining some transmission fluid and removing components like the valve body or solenoid pack depending on vehicle design.
- Repair Wiring Issues: Fix any frayed wires or poor connections that could be causing intermittent signals.
Address Transmission Fluid Issues
If low or contaminated fluid is found:
- Top Off Fluid: If levels are low due to leaks, repair leaks before refilling with manufacturer-recommended fluid.
- Fluid Change: If fluid quality is poor, perform a complete fluid change to restore proper function.
Professional Inspection
If problems persist after DIY repairs:
- Consult a certified mechanic for further diagnosis and potential internal transmission repairs.
Cost Estimates for Repairs
The cost of repairing issues related to a P0713 code can vary widely based on several factors:
- TFT Sensor Replacement: $100 – $300 (parts and labor).
- Wiring Repairs: $50 – $200 depending on complexity.
- Transmission Fluid Change: $100 – $200 depending on service rates and fluid type.
Professional diagnostics may incur additional costs ranging from $50 – $150.
Warnings and Recommendations
Important Warnings:
- Ignoring a P0713 code can lead to severe transmission damage and costly repairs.
- Always ensure proper safety measures when working on vehicles; disconnect battery terminals before performing electrical tests.
Recommendations:
- Regularly check and maintain your vehicle’s transmission fluid levels and condition.
- If unsure about any diagnosis or repair steps, seek professional assistance to avoid further complications.
Frequently Asked Questions About P0713
- What does the P0713 code mean?
The P0713 code indicates that there is a high input signal from the transmission fluid temperature sensor, suggesting overheating. - What are common symptoms associated with this code?
Symptoms include an illuminated check engine light, harsh shifting, limp mode activation, and irregular torque converter operation. - How serious is a P0713 code?
This code can indicate significant issues with your vehicle’s transmission; it should be addressed promptly. - Can I drive my vehicle with this code?
While it may be possible to drive short distances, it’s not advisable as it could lead to further damage. - What causes a P0713 code?
Common causes include a faulty TFT sensor, wiring issues, low or dirty transmission fluid, or problems with the PCM. - How do I fix a P0713 code?
Fixes typically involve replacing faulty components like sensors or wiring and addressing any fluid-related issues. - Is professional help necessary for this code?
If DIY diagnostics do not resolve the issue, consulting a professional mechanic is recommended. - What should I do if I see this code?
Perform initial diagnostics as outlined above and consider seeking professional help if necessary.
In conclusion, understanding and addressing the P0713 trouble code is essential for maintaining your vehicle’s performance. By following systematic diagnostic steps and employing effective repair methods, you can resolve this issue efficiently while ensuring your vehicle operates smoothly. Regular maintenance of your vehicle’s transmission system will help prevent future occurrences of this troublesome code.