P0708 Mercedes-Benz Code - Transmission Range Sensor Circuit High Input
Quick Answer
The P0708 code for Mercedes-Benz indicates a problem with the transmission range sensor circuit having a high input signal. Common causes include Damaged or corroded wiring in the transmission range sensor circuit, Faulty transmission range sensor, Issues with the vehicle's computer system. 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
- P0708 Mercedes-Benz indicates Transmission Range Sensor Circuit High Input.
- Common causes
- Common causes include Damaged or corroded wiring in the transmission range sensor circuit, Faulty transmission range sensor, Issues with the vehicle's computer system.
- 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 P0708 Mercedes-Benz Description
The P0708 code for Mercedes-Benz indicates a problem with the transmission range sensor circuit having a high input signal. The transmission range sensor, also known as the neutral safety switch, is responsible for communicating the position of the gear selector to the vehicle's engine control module. This information is crucial for the proper operation of the transmission and ensures that the vehicle starts only in Park or Neutral.
Common Causes of P0708 Mercedes-Benz
- Damaged or corroded wiring in the transmission range sensor circuit
- Faulty transmission range sensor
- Issues with the vehicle's computer system
- Poor connections or loose connectors in the circuit
- Electrical interference or shorts in the circuit
Symptoms of P0708 Mercedes-Benz
- Difficulty starting the vehicle
- Inability to shift gears smoothly
- Harsh shifting or delayed engagement
- Transmission slipping
- Illumination of the Check Engine Light
How to Fix P0708 Mercedes-Benz
- Perform a thorough inspection of the transmission range sensor circuit to identify any damaged wiring or connectors.
- Test the transmission range sensor using a multimeter to determine if it is functioning correctly.
- Replace any faulty wiring, connectors, or the transmission range sensor as needed.
- Clear the diagnostic trouble codes from the vehicle's computer system using an OBD-II scanner.
- Test drive the vehicle to ensure the issue has been resolved and the transmission is operating properly.
Cost to Fix P0708 Mercedes-Benz
The typical repair costs for addressing a P0708 code on a Mercedes-Benz can range from $200 to $500, depending on the extent of the issue and the specific components that need to be replaced. This estimate includes parts and labor, but actual costs may vary based on location, vehicle make and model, and the mechanic's hourly rates. It's recommended to consult with a qualified technician to get an accurate quote for the repair.
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Frequently Asked Questions about P0708 Mercedes-Benz Code
1. What does the OBDII code P0708 mean on a Mercedes-Benz?
P0708 indicates a "Transmission Range Sensor Circuit High Input," meaning the sensor is reporting input values higher than expected to the transmission control module (TCM).
2. What are the common symptoms of a P0708 code in a Mercedes-Benz?
Symptoms may include difficulty shifting gears, the transmission stuck in a single gear (limp mode), erratic shifting, the check engine light turning on, or the inability to start the vehicle.
3. What causes the P0708 code in a Mercedes-Benz?
Possible causes include a faulty transmission range sensor, damaged or corroded wiring, a misaligned sensor, or a malfunctioning transmission control module (TCM).
4. Can I drive my Mercedes-Benz with a P0708 code?
Driving with a P0708 code is not recommended, as it can lead to poor vehicle performance or further damage to the transmission.
5. How do I diagnose the P0708 code on my Mercedes-Benz?
Start by inspecting the transmission range sensor and its wiring for damage or corrosion. Use a diagnostic scanner to confirm the code and test the sensor's voltage and continuity.
6. How much does it cost to fix a P0708 code in a Mercedes-Benz?
Repair costs can vary widely, from $100–$300 for simple wiring repairs or sensor replacement, to higher costs if the TCM or other components need replacement.
7. What tools are needed to repair a P0708 code on a Mercedes-Benz?
You'll typically need a diagnostic scanner, multimeter for electrical testing, basic hand tools, and possibly a replacement transmission range sensor.
8. Can a bad battery cause a P0708 code in a Mercedes-Benz?
While unlikely, a weak or failing battery can sometimes cause electrical issues that may trigger transmission-related codes, including P0708.
9. Does the P0708 code always mean the transmission range sensor is faulty?
No, the issue could also be due to wiring problems, connector issues, or faults in the transmission control module.
10. How can I prevent the P0708 code from recurring on my Mercedes-Benz?
Regularly inspect and maintain your vehicle's electrical connections, keep the transmission range sensor clean and aligned, and address any transmission issues promptly.
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