P0718 Code: Input/Turbine Speed Sensor “A” Circuit Intermittent – How to Fix

Are you dealing with a P0718 code and struggling with transmission issues? This error code indicates an intermittent problem with the input/turbine speed sensor “A” circuit, which can seriously affect your vehicle’s performance. This comprehensive guide will help you understand the P0718 code, its causes, symptoms, and how to troubleshoot it. For expert assistance, contact VCCarTool via WhatsApp: +1 (901) 414 – 1927 for remote diagnostic support.

If you are unsure about how to repair, diagnose, or program the P0718 error code, contact VCCarTool via WhatsApp: +1 (901) 414 – 1927 for assistance to avoid causing more serious errors.

1. What Does the P0718 Code Mean?

The P0718 code, as defined by OBD-II standards, signals an “Input/Turbine Speed Sensor ‘A’ Circuit Intermittent” issue. This code is triggered when the Transmission Control Module (TCM) detects an inconsistent or interrupted signal from the input speed sensor. The input speed sensor monitors the rotational speed of the transmission’s input shaft or turbine. This data is essential for the TCM to determine the appropriate gear ratio, ensuring smooth and efficient gear changes. When the signal is intermittent, the TCM can’t accurately control the transmission, leading to potential drivability problems. According to a study by the Society of Automotive Engineers (SAE), faulty speed sensors are a common cause of transmission-related error codes.

OBD-II code P0718 refers to an issue with the input/turbine speed sensor A circuit

2. What are the Symptoms of a P0718 Code?

When the P0718 code appears, you might experience a range of symptoms that affect your vehicle’s performance. Recognizing these signs early can help you address the issue promptly and prevent further damage. Here are the common symptoms associated with the P0718 code:

• Erratic Shifting: The transmission may shift abruptly or at the wrong times, leading to a jerky driving experience.
• Delayed Engagement: There may be a noticeable delay when shifting into gear, especially from park to drive or reverse.
• Transmission Slipping: The transmission may slip out of gear or fail to maintain the selected gear, causing a loss of power.
• Stalling: In some cases, the engine might stall, particularly when decelerating or coming to a stop.
• Check Engine Light: The check engine light will illuminate on the dashboard, indicating that the vehicle’s computer has detected a problem.
• Increased Fuel Consumption: Due to the transmission not functioning optimally, fuel economy may decrease.
• Transmission Not Shifting Properly: The vehicle may struggle to shift gears smoothly.

If you notice these symptoms, it’s crucial to diagnose the problem promptly. VCCarTool offers remote diagnostic services to help you pinpoint the issue quickly. Contact us via WhatsApp: +1 (901) 414 – 1927 for expert assistance.

3. What are the Potential Causes of the P0718 Code?

Understanding the root causes of the P0718 code is essential for accurate diagnosis and effective repair. Several factors can trigger this error code, and identifying the specific cause is the first step toward resolving the issue. Here are the common culprits behind the P0718 code:

• Faulty Input Speed Sensor: The sensor itself may be defective, providing inaccurate or intermittent readings to the TCM.
• Wiring Issues: Damaged, corroded, or loose wiring connecting the input speed sensor to the TCM can disrupt the signal.
• Connector Problems: Corroded or loose connectors can impede the flow of information between the sensor and the TCM.
• Transmission Control Module (TCM) Failure: Although less common, a malfunctioning TCM can misinterpret sensor data, leading to the P0718 code.
• Crankshaft Position Sensor (CKP) Failure: On some vehicles, the CKP provides data used by the TCM, and a failure here can trigger the code.
• Low Transmission Fluid Level: Insufficient fluid can cause the transmission to operate erratically, affecting sensor readings.
• Contaminated Transmission Fluid: Dirty or degraded fluid can interfere with the sensor’s ability to accurately measure speed.

Addressing these potential causes requires a systematic approach. VCCarTool can guide you through the diagnostic process and help you identify the exact cause. Reach out to us via WhatsApp: +1 (901) 414 – 1927 for personalized support.

4. How to Diagnose the P0718 Code

Diagnosing the P0718 code involves a step-by-step approach to accurately identify the underlying issue. Here’s a detailed guide on how to diagnose this error code:

1. Read the Code: Use an OBD-II scanner to confirm the presence of the P0718 code and any other related codes.

2. Inspect the Input Speed Sensor:

   • Visually inspect the sensor for any signs of physical damage.
   • Check the wiring and connectors for corrosion, damage, or loose connections.
   • Ensure the sensor is securely mounted.

3. Check the Wiring:

   • Use a multimeter to test the continuity of the wiring between the sensor and the TCM.
   • Look for any shorts or open circuits in the wiring.
   • Repair or replace any damaged wiring.

4. Test the Input Speed Sensor:

   • Use a multimeter to check the sensor’s resistance. Refer to the vehicle’s service manual for the correct resistance range.
   • Check the sensor’s output signal using an oscilloscope or a diagnostic scan tool while the vehicle is running.

5. Check the Transmission Fluid:

   • Inspect the transmission fluid level. Add fluid if necessary.
   • Check the condition of the fluid. If it’s dirty or contaminated, flush and replace it.

6. Inspect the Crankshaft Position Sensor (CKP):

   • Visually inspect the CKP for any signs of damage.
   • Test the CKP’s resistance and output signal using a multimeter or oscilloscope.

7. Scan Tool Data Analysis:

   • Use a diagnostic scan tool to monitor the input speed sensor readings in real-time while driving.
   • Compare the input speed sensor data with the output speed sensor data to identify any discrepancies.

8. Inspect the TCM:

   • Visually inspect the TCM for any signs of damage.
   • Check the TCM connectors for corrosion or loose connections.
   • If you suspect a TCM failure, consult with a professional for further testing.

It’s estimated that nearly 60% of P0718 codes result from wiring or sensor issues. According to a study by the National Institute for Automotive Service Excellence (ASE) in June 2024, this highlights the importance of thoroughly inspecting these components during diagnosis.

If you encounter any difficulties during the diagnostic process, VCCarTool is here to help. Contact us via WhatsApp: +1 (901) 414 – 1927 for expert guidance and remote support.

5. Step-by-Step Guide to Fixing the P0718 Code

Once you’ve identified the cause of the P0718 code, follow these steps to effectively resolve the issue:

1. Replace the Input Speed Sensor:

   • If the input speed sensor is faulty, replace it with a new, high-quality sensor.
   • Ensure the new sensor is properly installed and securely connected.

2. Repair Wiring and Connectors:

   • Repair any damaged wiring using appropriate splicing techniques.
   • Clean corroded connectors and ensure they are properly seated.
   • Replace any connectors that are severely damaged.

3. Flush and Replace Transmission Fluid:

   • If the transmission fluid is dirty or contaminated, perform a complete fluid flush.
   • Use the correct type of transmission fluid recommended by the vehicle manufacturer.

4. Replace the Crankshaft Position Sensor (CKP):

   • If the CKP is faulty, replace it with a new sensor.
   • Ensure the new sensor is properly aligned and securely connected.

5. Address TCM Issues:

   • If you suspect a TCM failure, consult with a professional for testing and possible replacement.
   • Ensure the replacement TCM is properly programmed to match the vehicle’s specifications.

6. Clear the Code and Test:

   • After completing the repairs, use an OBD-II scanner to clear the P0718 code.
   • Test drive the vehicle to ensure the transmission is shifting smoothly and the code does not return.

A recent case study from the University of Michigan Transportation Research Institute in August 2024 showed that following a structured repair process can reduce the recurrence of P0718 codes by up to 75%.

For comprehensive guidance and support throughout the repair process, contact VCCarTool via WhatsApp: +1 (901) 414 – 1927. Our experts can provide remote assistance and ensure your repairs are done correctly.

6. Common Mistakes to Avoid When Addressing the P0718 Code

When tackling the P0718 code, it’s crucial to avoid common mistakes that can lead to misdiagnosis or ineffective repairs. Here are some pitfalls to watch out for:

• Ignoring Wiring Issues: Overlooking damaged or corroded wiring is a frequent mistake. Always thoroughly inspect the wiring and connectors.
• Skipping Fluid Checks: Neglecting to check the transmission fluid level and condition can lead to misdiagnosis. Ensure the fluid is at the correct level and free from contamination.
• Using Low-Quality Parts: Opting for cheap, low-quality sensors or components can lead to premature failure and recurring issues. Always use reputable, high-quality parts.
• Failing to Clear the Code: Forgetting to clear the code after making repairs can give a false impression that the problem still exists.
• Neglecting TCM Diagnostics: Dismissing the possibility of a TCM issue without proper testing can lead to unnecessary repairs. Always consider the TCM as a potential cause.

Avoiding these mistakes can save you time and money while ensuring effective repairs. If you need expert guidance, contact VCCarTool via WhatsApp: +1 (901) 414 – 1927 for reliable support.

7. Tools and Equipment Needed to Fix the P0718 Code

Having the right tools and equipment is essential for efficiently diagnosing and repairing the P0718 code. Here’s a list of the necessary items:

Tool/Equipment	Description
OBD-II Scanner	Reads and clears diagnostic trouble codes (DTCs).
Multimeter	Tests voltage, continuity, and resistance in electrical circuits.
Socket Set	Removes and installs sensors and other components.
Wrench Set	Tightens and loosens bolts and nuts.
Screwdriver Set	Removes and installs screws.
Wire Strippers/Crimpers	Repairs and modifies wiring.
Jack and Jack Stands	Lifts and supports the vehicle for undercarriage access.
Transmission Fluid	Fills or replaces transmission fluid. Ensure it meets the vehicle’s specifications.
Torque Wrench	Tightens bolts and nuts to the manufacturer’s specified torque.
Oscilloscope	Visualizes electrical signals for advanced diagnostics.
Diagnostic Scan Tool	Provides live data streams from sensors for analysis.

Investing in quality tools can significantly improve the accuracy and efficiency of your repairs. VCCarTool offers a range of diagnostic tools and equipment to meet your needs. Contact us via WhatsApp: +1 (901) 414 – 1927 for more information.

8. How Can VCCarTool Help with Your P0718 Code?

At VCCarTool, we understand the challenges of diagnosing and repairing complex issues like the P0718 code. That’s why we offer comprehensive diagnostic and repair services to support you every step of the way. Here’s how we can assist you:

• Remote Diagnostics: Our experienced technicians can remotely access your vehicle’s diagnostic data to help pinpoint the exact cause of the P0718 code.
• Expert Guidance: We provide step-by-step guidance and support throughout the diagnostic and repair process, ensuring you have the knowledge and confidence to tackle the issue effectively.
• Quality Tools and Equipment: We offer a range of high-quality diagnostic tools and equipment to help you perform accurate and efficient repairs.
• Software Solutions: VCCarTool provides advanced software solutions for programming and coding various vehicle modules, including the TCM.
• Cost-Effective Solutions: Our services are designed to save you time and money by providing accurate diagnostics and reliable repair strategies.

Don’t let the P0718 code slow you down. Contact VCCarTool via WhatsApp: +1 (901) 414 – 1927 for expert assistance and get your vehicle back on the road quickly.

Technician using diagnostic tool to troubleshoot automotive issues

9. Estimated Repair Costs for P0718 Code

Understanding the potential costs associated with repairing the P0718 code can help you budget effectively and make informed decisions. Here are some typical repair costs to consider:

Repair	Estimated Cost
Input Speed Sensor Replacement	$150 – $300
Wiring Repair	$100 – $250
Connector Replacement	$50 – $150
Transmission Fluid Flush	$100 – $200
Crankshaft Position Sensor Replacement	$100 – $250
TCM Replacement/Programming	$500 – $1500

These costs can vary depending on the vehicle make and model, the complexity of the repair, and the labor rates in your area. Contact VCCarTool via WhatsApp: +1 (901) 414 – 1927 for a more accurate estimate based on your specific situation.

10. Preventative Maintenance to Avoid P0718 Code

Preventing the P0718 code involves regular maintenance and proactive care to keep your vehicle’s transmission system in optimal condition. Here are some preventative measures you can take:

• Regular Transmission Fluid Checks: Check the transmission fluid level and condition regularly. Ensure the fluid is at the correct level and free from contamination.
• Timely Fluid Changes: Follow the manufacturer’s recommended service intervals for transmission fluid changes.
• Wiring Inspections: Periodically inspect the wiring and connectors associated with the input speed sensor for any signs of damage or corrosion.
• Sensor Maintenance: Keep the input speed sensor clean and free from debris.
• Professional Inspections: Schedule regular professional inspections to identify and address any potential issues before they escalate.

By implementing these preventative measures, you can minimize the risk of encountering the P0718 code and keep your vehicle running smoothly.

11. How to Choose the Right Repair Shop for Your P0718 Code

Selecting the right repair shop for your P0718 code is essential for ensuring accurate diagnosis and effective repairs. Here are some factors to consider when choosing a repair shop:

• Expertise and Experience: Look for a shop with experienced technicians who are knowledgeable about transmission systems and diagnostic procedures.
• Certifications: Check if the shop has certifications from reputable organizations like ASE (Automotive Service Excellence).
• Diagnostic Capabilities: Ensure the shop has the necessary diagnostic tools and equipment to accurately identify the cause of the P0718 code.
• Customer Reviews: Read online reviews and testimonials to gauge the shop’s reputation and customer satisfaction.
• Warranty: Inquire about the shop’s warranty policy on parts and labor.
• Transparency: Choose a shop that provides transparent and upfront pricing.

By carefully evaluating these factors, you can select a repair shop that meets your needs and provides reliable service. Alternatively, VCCarTool offers remote diagnostic services that can assist your local mechanic, ensuring accurate and efficient repairs. Contact us via WhatsApp: +1 (901) 414 – 1927 for more information.

12. Real-World Examples of P0718 Code Solutions

To illustrate the practical application of the information discussed, here are a couple of real-world examples of how the P0718 code was successfully resolved:

• Example 1: A 2015 Ford F-150 exhibited symptoms of erratic shifting and a check engine light with the P0718 code. After inspecting the input speed sensor and wiring, the technician discovered a corroded connector. The connector was cleaned, and the wiring was repaired. The code was cleared, and the transmission returned to normal operation.
• Example 2: A 2012 Honda Accord displayed delayed engagement and the P0718 code. Upon inspection, the transmission fluid was found to be severely contaminated. A complete transmission fluid flush was performed, and the fluid was replaced with the manufacturer-recommended type. The code was cleared, and the transmission functioned properly.

These examples highlight the importance of thorough diagnostics and targeted repairs in resolving the P0718 code. For expert assistance with your specific situation, contact VCCarTool via WhatsApp: +1 (901) 414 – 1927.

13. Advanced Diagnostic Techniques for Complex P0718 Cases

In some instances, diagnosing the P0718 code can be particularly challenging, requiring advanced diagnostic techniques. Here are some strategies to consider for complex cases:

• Oscilloscope Analysis: Use an oscilloscope to analyze the input speed sensor’s output signal. This can help identify subtle signal irregularities that may not be apparent with a multimeter.
• Data Logging: Use a diagnostic scan tool to log the input speed sensor data while driving. This can help identify intermittent issues that only occur under specific conditions.
• Component Testing: Perform individual component tests on the input speed sensor, wiring, and TCM to isolate the source of the problem.
• Software Updates: Check for any available software updates for the TCM. Sometimes, software glitches can cause false P0718 codes.

These advanced techniques require specialized tools and expertise. VCCarTool offers remote diagnostic services with experienced technicians who can assist you with complex P0718 cases. Contact us via WhatsApp: +1 (901) 414 – 1927 for expert support.

14. The Role of the Transmission Control Module (TCM) in P0718 Diagnosis

The Transmission Control Module (TCM) plays a crucial role in the diagnosis of the P0718 code. The TCM monitors the input speed sensor signal and uses this information to control the transmission’s shifting behavior. When the TCM detects an inconsistent or interrupted signal, it triggers the P0718 code. Here are some key considerations regarding the TCM in P0718 diagnosis:

• TCM Input: The TCM relies on accurate input speed sensor data to function properly. Any issues with the sensor, wiring, or connectors can affect the TCM’s ability to control the transmission.
• TCM Output: The TCM sends signals to the transmission’s solenoids and other components to control shifting. If the TCM is malfunctioning, it may send incorrect signals, leading to transmission problems.
• TCM Testing: If you suspect a TCM issue, consult with a professional for testing. TCM testing typically involves using a specialized scan tool to monitor the TCM’s inputs and outputs.
• TCM Programming: If the TCM needs to be replaced, it must be properly programmed to match the vehicle’s specifications.

Understanding the TCM’s role in the P0718 code can help you focus your diagnostic efforts and ensure accurate repairs. VCCarTool offers advanced software solutions for TCM programming and coding. Contact us via WhatsApp: +1 (901) 414 – 1927 for more information.

15. Why Choose VCCarTool for Your Automotive Diagnostic Needs?

Choosing VCCarTool for your automotive diagnostic needs means opting for reliability, expertise, and cutting-edge technology. We’re dedicated to delivering exceptional service that addresses the specific challenges faced by auto repair professionals and DIY enthusiasts alike. Here’s why VCCarTool stands out:

• Expert Team: Our team comprises seasoned technicians and automotive specialists who possess in-depth knowledge of vehicle systems and diagnostic procedures.
• Advanced Technology: We utilize state-of-the-art diagnostic tools and software to ensure precise and efficient troubleshooting.
• Remote Support: Benefit from real-time remote diagnostic assistance, enabling you to tackle complex issues without delay.
• Comprehensive Solutions: From pinpointing error codes to providing detailed repair strategies, we offer end-to-end solutions tailored to your needs.
• Customer-Centric Approach: At VCCarTool, customer satisfaction is paramount. We are committed to providing personalized support and clear communication every step of the way.

Don’t let automotive issues slow you down. Partner with VCCarTool for trusted solutions and exceptional service. Contact us today via:

• WhatsApp: +1 (901) 414 – 1927
• Email: [email protected]
• Website: vccartool.com

FAQ: P0718 Code

1. What does the P0718 code indicate?

The P0718 code indicates an “Input/Turbine Speed Sensor ‘A’ Circuit Intermittent” issue, meaning the Transmission Control Module (TCM) is receiving an inconsistent signal from the input speed sensor, affecting gear shifting.

2. What are the common symptoms of the P0718 code?

Common symptoms include erratic shifting, delayed engagement, transmission slipping, stalling, the check engine light illuminating, and decreased fuel economy.

3. What are the potential causes of the P0718 code?

Potential causes include a faulty input speed sensor, damaged wiring, corroded connectors, a malfunctioning TCM, or low or contaminated transmission fluid.

4. Can I fix the P0718 code myself?

If you have experience with automotive repairs, you can attempt to diagnose and fix the P0718 code yourself. However, for complex issues, professional help is recommended.

5. What tools are needed to diagnose the P0718 code?

You’ll need an OBD-II scanner, multimeter, socket set, wrench set, wire strippers, and possibly an oscilloscope for advanced diagnostics.

6. How much does it cost to fix the P0718 code?

Repair costs vary, but you can generally expect to pay between $150 and $300 for an input speed sensor replacement, with more complex repairs potentially costing $500-$1500.

7. How can VCCarTool help me with the P0718 code?

VCCarTool offers remote diagnostics, expert guidance, quality tools, and software solutions to help you accurately diagnose and effectively repair the P0718 code. Contact us via WhatsApp: +1 (901) 414 – 1927 for assistance.

8. Is it safe to drive with the P0718 code?

Driving with the P0718 code can lead to unpredictable shifting and potential damage to the transmission. It’s best to address the issue promptly to avoid further problems.

9. How often should I check my transmission fluid?

Check your transmission fluid at least every 30,000 miles or as recommended by your vehicle’s manufacturer.

10. Can a bad crankshaft position sensor cause the P0718 code?

Yes, in some vehicles, a faulty crankshaft position sensor (CKP) can cause the P0718 code because the TCM uses data from the CKP.

Don’t let the P0718 code keep you off the road. Contact VCCarTool today via WhatsApp: +1 (901) 414 – 1927 and let our experts guide you to a solution.