Fix P0713 Code: Transmission Oil Temp Sensor A Circuit High Input – iCarsoft CR MAX BT Fixes It!
If your check engine light just popped on, and you’re noticing weird transmission behavior—like rough shifts, delayed engagement, or even a “limp mode” warning—chances are you might be dealing with the P0713 fault code. For most car owners, this code feels like a mystery: Is it a serious issue? Will it cost a fortune to fix? Can I diagnose it myself?
In this guide, we’ll break down everything you need to know about the P0713 code (transmission oil temperature sensor A circuit high input) and introduce the iCarsoft CR MAX BT OBD2 Scanner—the DIY-friendly tool that lets you read, diagnose, and clear P0713 (and hundreds of other codes) from the comfort of your garage. No mechanic fees, no complicated setup—just results.
What Exactly Is the P0713 Fault Code?
The P0713 code is a generic OBD-II trouble code that indicates a high input signal from the transmission oil temperature (TOT) sensor A to your vehicle’s engine control module (ECU) or transmission control module (TCM). Here’s what that means in plain English:
Your car’s TOT sensor monitors the temperature of the transmission fluid—critical because overheated or overly cool fluid can damage the transmission, reduce fuel efficiency, and cause shifting problems. When the sensor sends a signal that’s higher than the ECU/TCM expects (usually due to a faulty sensor, wiring issue, or fluid problem), the P0713 code is triggered, and the check engine light illuminates. This code is common in:
- Honda Civic P0713: Most common in 2016–2023 models, linked to faulty TOT sensors or low transmission fluid.
- Toyota Corolla P0713: Typically caused by corroded wiring connecting the TOT sensor to the TCM (prevalent in 2015–2022 variants).
- BMW X3 P0713: Frequently stems from contaminated transmission fluid affecting sensor readings (common in 2017–2024 luxury SUVs).
- Ford F-150 P0713: Often due to loose electrical connections at the TOT sensor (high-mileage 2018–2023 trucks).
Common Symptoms of a P0713 Code
Don’t ignore these red flags—they’re your car’s way of telling you something’s wrong with the transmission temperature system:
- Illuminated Check Engine Light (MIL): The most obvious and consistent sign of P0713.
- Rough, Jerky, or Delayed Gear Shifts: The TCM adjusts shift timing based on fluid temp—faulty sensor data disrupts this process.
- Transmission Slips or Refuses to Shift: In severe cases, the transmission may not engage gears properly or slip out of gear.
- Vehicle Enters “Limp Mode”: The TCM limits speed to 40–50 mph to protect the transmission from overheating damage.
- Poor Fuel Economy: Incorrect fluid temp data leads to inefficient transmission operation, increasing fuel consumption by 8–12%.
- Unusual Transmission Noises: Grinding or whining sounds (sign of overheated fluid or worn gears from incorrect shifting).
- Inability to Start (Rare): Some TCMs disable the engine if they detect extreme (false) high temp readings from the TOT sensor.
What Causes the P0713 Error Code? (And How CR MAX BT Identifies Them)
Internal sensor failure sends false high temp signals. The CR MAX BT’s live data streaming verifies if sensor readings match actual fluid temp (ruling out sensor failure).
Shorted or corroded wires disrupt signal flow. The CR MAX BT tests circuit voltage to detect wiring issues vs. sensor faults.
Poor fluid quality affects sensor accuracy. The CR MAX BT’s fluid temp monitoring shows inconsistent readings linked to contaminated fluid.
Module glitches misinterpret sensor data. The CR MAX BT checks for firmware updates to fix false P0713 triggers from ECU/TCM errors.
Loose sensor/module connections cause intermittent high input signals. The CR MAX BT’s freeze frame data identifies when the error occurs (linked to vibration/loose connections).
Why iCarsoft CR MAX BT Is the Best Tool for P0713
The biggest mistake car owners make with P0713 is rushing to a mechanic and paying $100–$200 just for a diagnosis. With the iCarsoft CR MAX BT OBD2 Scanner, you can do it yourself in 5 minutes—saving time, money, and hassle. Here’s why this tool is a must-have:
Reads and clears P0713 (and all transmission-related codes) for 99% of vehicles—gas, diesel, hybrid (Ford, Toyota, BMW, Mercedes, Honda, Chevrolet, etc.).
Connects wirelessly to iOS/Android devices—no messy cables, just pair the scanner with your phone/tablet and scan from anywhere.
Shows real-time transmission fluid temperature, sensor data, and freeze frame info (exactly when the P0713 error occurred).
Intuitive app with step-by-step guides—no technical skills or mechanical experience required to diagnose P0713.
Fixes more than just P0713—works on engine, ABS, airbags, HVAC, and other vehicle systems for all-around diagnostics.
Stay compatible with new vehicle models and diagnostic protocols—no subscription fees, ever.
Pro Tip: The CR MAX BT’s real-time transmission fluid temp monitoring is key—if the sensor reading is 300°F+ (but fluid is cool), it’s a faulty sensor (easy $30 fix), not a $1,000 transmission rebuild.
FAQs About P0713 Code & iCarsoft CR MAX BT
P0713 means your vehicle’s transmission oil temperature (TOT) sensor is sending a “high input” signal to the ECU/TCM. This tells your car the transmission fluid is hotter (or the sensor is faulty) than normal, triggering the check engine light and potential transmission issues.
You can drive short distances (e.g., to a safe location or garage), but long-term driving is not recommended. The TCM may put the transmission in limp mode to protect it, and continued use could lead to costly damage (e.g., burnt fluid, worn gears). Diagnose it immediately with the iCarsoft CR MAX BT.
P0712 is a “low input” signal from the TOT sensor, while P0713 is a “high input” signal. Both relate to the TOT sensor, but P0713 specifically indicates the sensor’s signal is higher than the ECU/TCM’s acceptable range. The iCarsoft CR MAX BT reads both codes and helps you distinguish between them.
Absolutely! The scanner pairs with a free app (iCarsoft BT) that has a simple, user-friendly interface. Just plug the device into your car’s OBD-II port (under the dashboard), pair it with your phone, and tap “Scan”—it will automatically detect P0713 and explain what it means. No mechanical experience required.
The iCarsoft CR MAX BT is compatible with all OBD-II compliant vehicles (model years 1996 and newer in the U.S., 2001+ in Europe, 2003+ in Asia). It works with cars, trucks, SUVs, and hybrids from brands like Honda, Chevrolet, Volkswagen, Audi, Hyundai, and more. Check the product page for full compatibility: icarsoft.com/cr-max-bt
Yes—if you fix the root cause (e.g., replace a faulty sensor, repair wiring, change transmission fluid). The scanner clears the code, and you can use its “monitor” feature to check if the error returns. If the code comes back, the tool will help you re-diagnose and pinpoint the issue.
Mechanics typically charge $80–$200 for a P0713 diagnosis alone. With the iCarsoft CR MAX BT (one-time purchase), you’ll save that cost immediately. Plus, you can use it for future codes—no more paying for diagnostics every time the check engine light comes on.
Yes! iCarsoft offers 24/7 technical support and a 1-year warranty. If you have questions about using the scanner for P0713 or any other code, their team is ready to help via phone, email, or chat.
Final Thoughts: Don’t Let P0713 Ruin Your Ride
The P0713 code might seem scary, but it’s usually a simple fix—if you have the right tool. The iCarsoft CR MAX BT takes the guesswork out of diagnostics, letting you read, understand, and clear P0713 (and other codes) without leaving home. Save money, avoid mechanic headaches, and keep your car running smoothly.
Ready to fix P0713 today? Grab your iCarsoft CR MAX BT here: https://www.icarsoft.com/Product/s-391-icarsoft_cr_max_bt.html
Have questions about P0713 or the iCarsoft CR MAX BT? Drop a comment below—we’re happy to help!