The P0713 trouble code indicates a problem with the Transmission Fluid Temperature (TFT) Sensor ‘A’ circuit, specifically signaling that the voltage reading from the sensor is too high. This code is part of the OBD-II diagnostic system and is crucial for monitoring the temperature of the transmission fluid, which plays a vital role in the overall performance and longevity of the vehicle’s transmission system. When this code is triggered, it can lead to various symptoms that may affect drivability, making it essential for vehicle owners and DIY mechanics to understand its implications and how to address it effectively.
| P0713 Code Meaning | P0713 Code Common Causes |
|---|---|
| Transmission Fluid Temperature Sensor ‘A’ Circuit High | Faulty TFT sensor |
| High voltage signal detected by the PCM | Wiring issues (open or short circuits) |
| Potential overheating of transmission fluid | Low or dirty transmission fluid |
| Transmission control module (TCM) malfunction | Internal transmission problems |
Symptoms of P0713 Code
When the P0713 code is triggered, drivers may experience several symptoms, including:
- Check Engine Light: The most common indicator that something is wrong.
- Harsh or Delayed Shifting: Difficulty in shifting gears smoothly can occur.
- Limp Mode Activation: The vehicle may enter a protective mode that limits performance to prevent further damage.
- Irregular Torque Converter Clutch Operation: The clutch may not engage or disengage properly, affecting acceleration.
- A/T Oil Temp Light: If equipped, this light may illuminate on the dashboard.
Understanding these symptoms can help in diagnosing the issue more effectively.
Technical Explanation of P0713 Code
The P0713 code is set when the Powertrain Control Module (PCM) detects a high voltage signal from the Transmission Fluid Temperature Sensor. This sensor measures the temperature of the transmission fluid and sends this information to the PCM. If the voltage exceeds manufacturer specifications, it indicates that either the fluid temperature is too high or there is a fault in the sensor or its wiring.
How Transmission Fluid Temperature Affects Performance
Transmission fluid serves multiple purposes: it lubricates moving parts, cools components, and provides hydraulic pressure for shifting. When fluid temperatures rise excessively, it can lead to:
- Increased Wear: Higher temperatures can degrade fluid quality and increase wear on internal components.
- Slipping Gears: Overheating can cause gears to slip, leading to poor performance.
- Complete Transmission Failure: In severe cases, prolonged exposure to high temperatures can result in catastrophic failure.
Step-by-Step Diagnosis of P0713 Code
Diagnosing a P0713 code involves a systematic approach:
Step 1: Visual Inspection
Begin with a thorough visual inspection of:
- The TFT sensor and its wiring for any visible damage, such as frayed wires or loose connections.
- Ensure that all connectors are secure and free from corrosion.
Step 2: Check Transmission Fluid Level and Condition
Inspect the transmission fluid level using the dipstick. If low, refill with manufacturer-recommended fluid. Also, check for discoloration or burnt smell indicating contamination.
Step 3: Use a Scan Tool
Connect an OBD-II scanner to read current codes and monitor live data from the TFT sensor. Look for:
- Voltage readings from the sensor.
- Compare actual readings with expected values based on manufacturer specifications.
Step 4: Test the TFT Sensor
Disconnect the TFT sensor and test its resistance using a multimeter:
- Measure resistance between terminals while gradually heating (if possible). The resistance should decrease as temperature increases.
If it does not behave as expected, replace the sensor.
Step 5: Check Wiring and Connectors
Using a multimeter set to ohms:
- Test for continuity in wires leading to the TFT sensor.
- Check for shorts or opens in wiring harnesses that could affect signal transmission.
Step 6: Inspect PCM/TCM
If all previous tests are normal but the code persists:
- Inspect connections at both PCM and TCM.
- In some cases, reprogramming or replacing these modules may be necessary if they are faulty.
Solution Methods for P0713 Code
Once diagnosed, several methods can be employed to resolve issues related to the P0713 code:
Replace Faulty Sensor
If testing confirms that the TFT sensor is defective, replace it with an OEM part to ensure compatibility and reliability.
Repair Wiring Issues
If damaged wiring or connectors are found during inspection:
- Repair any frayed wires or replace connectors as needed.
- Ensure all connections are secure to prevent future issues.
Change Transmission Fluid
If low or dirty fluid was identified as a cause:
- Drain old fluid completely and replace it with fresh fluid according to manufacturer specifications.
- This not only helps in resolving overheating issues but also prolongs transmission life.
Consult a Professional Mechanic
If after all troubleshooting steps you still encounter issues:
- It may be wise to consult with an ASE-certified technician who specializes in transmissions. They have access to advanced diagnostic tools that can pinpoint complex issues more accurately.
The cost associated with resolving a P0713 code can vary widely based on several factors including location, vehicle make/model, and specific repairs needed:
- TFT Sensor Replacement: $100 – $300 (parts + labor)
- Wiring Repairs: $50 – $150 depending on extent of damage
- Transmission Fluid Change: $100 – $200
- Professional Diagnosis: $75 – $150 per hour at most shops
These estimates can help vehicle owners budget effectively for repairs related to this trouble code.
Warnings and Recommendations
When dealing with transmission-related trouble codes like P0713:
- Do Not Ignore Symptoms: Addressing issues promptly can prevent costly repairs down the line.
- Use OEM Parts: Always opt for original equipment manufacturer parts when replacing components for better fit and reliability.
- Seek Professional Help When Needed: If unsure about any step in diagnosing or repairing your vehicle, consult with a professional mechanic.
Closing Paragraph
In conclusion, understanding and addressing the P0713 trouble code is essential for maintaining your vehicle’s transmission health. By following systematic diagnostic steps and implementing appropriate solutions—whether through DIY methods or professional assistance—vehicle owners can effectively manage this issue. Regular maintenance checks on transmission fluid levels and conditions can also help prevent such codes from arising in the future. Always prioritize safety and proper procedures when working on your vehicle’s systems.
Frequently Asked Questions About P0713
- What does the P0713 code mean?
The P0713 code indicates that there is an issue with the Transmission Fluid Temperature Sensor ‘A’ circuit, specifically that it is reading high voltage. - What are common symptoms of a P0713 code?
Common symptoms include an illuminated check engine light, harsh shifting, limp mode activation, and irregular torque converter clutch operation. - How serious is a P0713 code?
The seriousness of a P0713 code can vary; if left unaddressed, it could lead to significant transmission damage. - Can I drive my car with a P0713 code?
While you might be able to drive short distances, it’s advisable not to ignore this code as it could lead to further damage. - How do I fix a P0713 code?
Fixing this code typically involves replacing a faulty TFT sensor, repairing wiring issues, or changing contaminated transmission fluid. - What tools do I need to diagnose a P0713 code?
A basic OBD-II scanner, multimeter for electrical testing, and tools for visual inspections will be necessary. - Is professional help always required for P0713?
If you’re not comfortable performing diagnostics or repairs yourself, seeking professional help is recommended. - What if I clear the code but it comes back?
If clearing the code does not resolve it permanently, further diagnostics are needed as there may be underlying issues still present.