P0718 - Transmission Fluid Temperature Sensor Range/Performance Problem in Popular Vehicles

Quick Answer

P0718 means: P0718 indicates a problem with the transmission fluid temperature sensor circuit.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with P0718? Immediate attention is recommended to prevent transmission damage.

Common Questions

What does P0718 mean and how does it affect my car?

P0718 indicates that there is a problem with the transmission fluid temperature sensor. This can lead to poor shifting performance, decreased fuel efficiency, and potential transmission overheating if not addressed. Ignoring this code can result in costly repairs down the line.

What are the most common causes of P0718 and how much does it cost to fix?

Common causes of P0718 include a faulty transmission fluid temperature sensor, damaged wiring, or low fluid levels. Repair costs can vary widely, ranging from $100 to $300 for sensor replacement, depending on the vehicle make and model.

Can I drive my car with P0718 or should I stop immediately?

It is not advisable to drive your vehicle with a P0718 code, as it may lead to transmission overheating and further damage. It’s best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose P0718 myself using GeekOBD APP?

To diagnose P0718 using the GeekOBD APP, first connect the app to your vehicle's OBD2 port. Then, scan for diagnostic codes and view freeze frame data to assess the situation. Check the live data to monitor the transmission fluid temperature sensor readings.

What vehicles are most commonly affected by P0718?

P0718 is commonly found in models such as the 2015-2018 Honda Civic, 2016-2020 Toyota Camry, and 2014-2019 Ford Fusion. Always check for any recalls or technical service bulletins related to your vehicle.

How can I prevent P0718 from happening again?

To prevent P0718 from recurring, regularly check and maintain your transmission fluid levels, ensure proper electrical connections, and consider periodic diagnostic scans using the GeekOBD APP to catch potential issues early.

What is P0718?

The Diagnostic Trouble Code (DTC) P0718 indicates a problem with the transmission fluid temperature sensor circuit. Specifically, it signifies that the Engine Control Module (ECM) has detected a range or performance issue with the sensor responsible for monitoring the temperature of the transmission fluid. This sensor is crucial for proper transmission operation, as it helps the ECM regulate the shifting points and overall performance of the transmission. When this code appears, it can lead to several issues, such as erratic shifting, poor fuel economy, and even potential damage to the transmission system. Vehicles commonly affected by P0718 include the 2015-2018 Honda Civic, 2016-2020 Toyota Camry, and 2014-2019 Ford Fusion, among others. If not addressed promptly, this issue could result in overheating of the transmission fluid and severe transmission wear, increasing repair costs in the long run. Car owners should take this code seriously and consider a diagnostic assessment as soon as possible to prevent further complications.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0718 is present:

  • The check engine light remains illuminated, indicating a potential issue that needs to be diagnosed.
  • Drivers may notice that the engine hesitates or has difficulty accelerating, leading to a frustrating driving experience.
  • There could be a measurable decrease in fuel economy, with reports showing a drop of 10-15% in some affected vehicles.
  • Shifts may become erratic or harsh, making driving uncomfortable and potentially dangerous.
  • In severe cases, the transmission may enter 'limp mode,' restricting vehicle speed and performance.

Possible Causes

Most common causes of P0718 (ordered by frequency):

  1. The most common cause of P0718 is a faulty transmission fluid temperature sensor, occurring in approximately 60% of cases. This sensor can fail due to age or exposure to extreme temperatures.
  2. Another cause could be damaged wiring or poor connections in the sensor circuit, which may affect the signal sent to the ECM.
  3. A third potential cause is low or contaminated transmission fluid, which can impact sensor performance. Regular fluid checks can help prevent this issue.
  4. Less commonly, a malfunctioning ECM may misinterpret sensor data, leading to erroneous codes. This scenario is rare but can complicate diagnostics.
  5. In rare instances, issues with the transmission control module may also contribute to this code, although this is not frequently observed.

P0718 Repair Costs

Cost Breakdown by Repair Type

Transmission Fluid Temperature Sensor Replacement

Replacing the faulty transmission fluid temperature sensor, which is often the primary issue.

  • Total: $100 - $300
  • Success rate: 85%
Wiring and Connector Repair

Repairing or replacing damaged wiring and connectors in the sensor circuit.

  • Total: $50 - $150
  • Success rate: 75%
Transmission Fluid Change

Changing the transmission fluid if contamination is suspected.

  • Total: $150 - $250
  • Success rate: 70%
Money-Saving Tips for P0718
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0718 Diagnosis Process

Follow these systematic steps to accurately diagnose P0718. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection to check for any obvious signs of damage, such as frayed wiring, loose connections, or corrosion around the transmission fluid temperature sensor (5-10 minutes)

Step 1: Conduct an initial visual inspection to check for any obvious signs of damage, such as frayed wiring, loose connections, or corrosion around the transmission fluid temperature sensor (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze frame data to understand the context of the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all diagnostic codes and freeze frame data to understand the context of the fault (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Test the suspected components with a multimeter to measure voltage and resistance, ensuring they are within manufacturer specifications (20-30 minutes)

Step 3: Test the suspected components with a multimeter to measure voltage and resistance, ensuring they are within manufacturer specifications (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: After any necessary repairs, conduct a system function test to verify proper operation and clear any codes from the ECM (10-15 minutes)

Step 4: After any necessary repairs, conduct a system function test to verify proper operation and clear any codes from the ECM (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Perform a road test under various driving conditions to confirm that the repair was successful and that the symptoms have been resolved (15-20 minutes)

Step 5: Perform a road test under various driving conditions to confirm that the repair was successful and that the symptoms have been resolved (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Transmission Fluid Temperature Sensor Replacement on 2016 Honda Civic

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Customer reported check engine light and rough shifting.

Diagnosis: Using the GeekOBD APP, the code P0718 was retrieved, and initial checks revealed a faulty sensor.

Solution: Replaced the transmission fluid temperature sensor. Inspected wiring for damage and confirmed connections were secure.

Cost: $220 (including parts and labor)

Result: Post-repair, the check engine light was cleared, and the vehicle shifted smoothly.

Case Study 2: Wiring Repair on 2017 Toyota Camry

Vehicle: 2017 Toyota Camry, 60,000 miles

Problem: Driver experienced erratic shifting and check engine light.

Diagnosis: GeekOBD APP scan showed P0718. Visual inspection revealed damaged wiring in the sensor circuit.

Solution: Repaired the damaged wiring and replaced the transmission fluid due to contamination.

Cost: $180 (including parts and labor)

Result: The vehicle now operates normally without any warning lights.

Diagnose P0718

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0718
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes