P0718 Mercedes-Benz Code - Input/Turbine Speed Sensor Circuit Intermittent
Quick Answer
The P0718 diagnostic trouble code (DTC) for Mercedes-Benz vehicles refers to an issue with the Input/Turbine Speed Sensor Circuit being intermittent. Common causes include Faulty Input/Turbine Speed Sensor, Damaged wiring harness or connectors, Corrosion or buildup on sensor contacts. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0718 Mercedes-Benz indicates Input/Turbine Speed Sensor Circuit Intermittent.
- Common causes
- Common causes include Faulty Input/Turbine Speed Sensor, Damaged wiring harness or connectors, Corrosion or buildup on sensor contacts.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0718 Mercedes-Benz Description
The P0718 diagnostic trouble code (DTC) for Mercedes-Benz vehicles refers to an issue with the Input/Turbine Speed Sensor Circuit being intermittent. The Input/Turbine Speed Sensor is a crucial component in the vehicle's transmission system, responsible for monitoring the speed of the input shaft and turbine shaft within the transmission. This information is vital for the transmission control module to accurately control shifting points and ensure the transmission operates smoothly.
Common Causes of P0718 Mercedes-Benz
- Faulty Input/Turbine Speed Sensor
- Damaged wiring harness or connectors
- Corrosion or buildup on sensor contacts
- Issues with the transmission control module
- Electrical interference or signal interruption
Symptoms of P0718 Mercedes-Benz
- Erratic shifting behavior
- Harsh or delayed gear shifts
- Transmission slipping
- Check Engine Light illuminated
- Decreased fuel efficiency
How to Fix P0718 Mercedes-Benz
- Begin by conducting a thorough diagnostic scan to confirm the P0718 code and identify the specific cause of the issue.
- Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the Input/Turbine Speed Sensor for proper functionality and signal output. Replace if faulty.
- Clear the DTC and reset the transmission control module to see if the issue persists.
- If the problem persists, further diagnosis may be required to pinpoint any underlying transmission control module issues.
Cost to Fix P0718 Mercedes-Benz
The typical repair costs for addressing a P0718 code can vary depending on the specific cause of the issue. In general, replacing a faulty Input/Turbine Speed Sensor or repairing wiring harness problems can range from $200 to $500, including parts and labor. However, if the issue is more complex and involves the transmission control module, costs can increase significantly.
When is the Code Detected?
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Frequently Asked Questions about P0718 Mercedes-Benz Code
1. What does the OBDII code P0718 mean for a Mercedes-Benz?
P0718 indicates an intermittent issue in the input/turbine speed sensor circuit, which monitors the speed of the transmission's input shaft.
2. What are the common symptoms of code P0718 in a Mercedes-Benz?
Symptoms may include erratic shifting, transmission slipping, delayed acceleration, or the vehicle going into limp mode. The check engine light will also typically illuminate.
3. What causes the P0718 code to appear on a Mercedes-Benz?
Common causes include a faulty input/turbine speed sensor, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or internal transmission issues.
4. How do you diagnose the P0718 code in a Mercedes-Benz?
A technician will inspect the input speed sensor and its wiring, check for continuity and resistance, and use a scan tool to monitor live data from the transmission system.
5. Can I drive my Mercedes-Benz with the P0718 code active?
Driving with this code is not recommended as it can cause further damage to the transmission or result in unsafe driving conditions due to erratic shifting.
6. How is the P0718 code typically repaired on a Mercedes-Benz?
Repairs may involve replacing the input/turbine speed sensor, repairing or replacing damaged wiring, or reprogramming or replacing the transmission control module (TCM).
7. How much does it cost to fix the P0718 code on a Mercedes-Benz?
Costs vary depending on the issue, but replacing the input speed sensor typically ranges from $150 to $400, including parts and labor.
8. Can a low transmission fluid level cause the P0718 code?
While not a direct cause, low or dirty transmission fluid can lead to sensor-related issues or transmission problems that trigger this code.
9. Will clearing the P0718 code with a scan tool fix the issue?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.
10. Is the P0718 code common in Mercedes-Benz vehicles?
It’s not a particularly common code, but it can occur in Mercedes-Benz vehicles with aging transmissions or sensor-related wear and tear.
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