P0718 Mercedes-Benz Code - Input/Turbine Speed Sensor Circuit Intermittent
Quick Answer
The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission Control Module (TCM) and Engine Control Module (ECM). Common causes include Faulty Transmission Speed Sensor, Transmission Speed Sensor harness is open or shorted, Transmission Speed Sensor circuit poor electrical connection. 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 Transmission Speed Sensor, Transmission Speed Sensor harness is open or shorted, Transmission Speed Sensor circuit poor electrical connection.
- 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.
Code P0718 Mercedes-Benz Description
What are the Possible Causes of the DTC P0718 Mercedes-Benz?
- Faulty Transmission Speed Sensor
- Transmission Speed Sensor harness is open or shorted
- Transmission Speed Sensor circuit poor electrical connection
How to Fix the DTC P0718 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0718 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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