Engine-CodesMercury – P0708 Mercury

P0708 Mercury Code - Transmission Range Sensor Circuit High Input

Quick Answer

The P0708 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the Transmission Range Sensor Circuit High Input. Common causes include Faulty transmission range sensor, Damaged or corroded wiring in the transmission range sensor circuit, 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 Mercury indicates Transmission Range Sensor Circuit High Input.
Common causes
Common causes include Faulty transmission range sensor, Damaged or corroded wiring in the transmission range sensor circuit, 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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0708 Mercury Description

The P0708 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the Transmission Range Sensor Circuit High Input. The transmission range sensor, also known as the neutral safety switch, is a crucial component in automatic transmissions that helps the vehicle's computer determine the correct gear to engage based on the position of the shift lever. When the sensor detects a high input signal, it means that there is an issue with the circuit that could potentially affect the transmission's performance.

OBDII Code P0708 Mercury - Transmission Range Sensor Circuit High Input
P0708 Mercury Code - Transmission Range Sensor Circuit High Input

Common Causes of P0708 Mercury

  1. Faulty transmission range sensor
  2. Damaged or corroded wiring in the transmission range sensor circuit
  3. Issues with the vehicle's computer system
  4. Poor electrical connections or ground connections
  5. Water or debris intrusion in the transmission range sensor circuit

Symptoms of P0708 Mercury

  1. Difficulty shifting gears or erratic shifting behavior
  2. Inability to start the vehicle
  3. Illumination of the Check Engine Light
  4. Harsh shifting or slipping transmission
  5. Loss of power or acceleration issues

How to Fix P0708 Mercury

  1. Diagnose the issue by using a scan tool to retrieve the trouble codes and inspecting the transmission range sensor circuit for any visible damage.
  2. Test the transmission range sensor using a multimeter to check for proper voltage and continuity.
  3. Replace the transmission range sensor if it is found to be faulty, ensuring proper installation and calibration.
  4. Repair or replace any damaged wiring in the transmission range sensor circuit.
  5. Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0708 Mercury

The cost of repairing a Transmission Range Sensor Circuit High Input issue can vary depending on the extent of the damage and the specific parts needed for the repair. On average, the cost of parts for a transmission range sensor replacement can range from $50 to $200, while labor costs can add an additional $100 to $200. Overall, the total repair cost could fall between $150 and $400. Keep in mind that labor rates can vary between different auto repair shops, so it's recommended to obtain quotes from multiple sources to get a more accurate estimate.

Tech Notes for P0708 Mercury









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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0708 Mercury Code

1. What are the common symptoms of OBDII code P0708 (Transmission Range Sensor Circuit High Input) in a Mercury vehicle?

- Common symptoms include issues with shifting gears, the transmission staying in one gear, hesitation when accelerating, and the Check Engine Light illuminating.

2. What can cause the OBDII code P0708 to trigger in a Mercury vehicle?

- This code is typically triggered by a faulty transmission range sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's circuit.

3. How serious is the OBDII code P0708 in a Mercury vehicle?

- Ignoring this code can lead to poor drivability, potential transmission issues, and safety concerns. It is recommended to address the underlying problem promptly.

4. Can I still drive my Mercury with the OBDII code P0708 present?

- It is not advisable to drive the vehicle with this code present, as it can cause further damage to the transmission and affect the overall performance of the vehicle.

5. How can I diagnose the OBDII code P0708 in my Mercury?

- Diagnosing this code involves using a scan tool to check for the specific code, inspecting the transmission range sensor and its connections, and testing the sensor's functionality.

6. Is it possible to repair the OBDII code P0708 in a Mercury by myself?

- While some DIY enthusiasts may attempt to repair this code, it is recommended to seek professional help due to the complexity of transmission range sensor circuits.

7. What are some repair tips for addressing the OBDII code P0708 in a Mercury?

- Repair tips may include checking and cleaning the sensor connections, replacing the transmission range sensor if necessary, and ensuring proper wiring integrity.

8. How much does it cost to fix the OBDII code P0708 in a Mercury?

- The cost of fixing this code can vary depending on the extent of the issue, the parts needed for the repair, and whether you choose to do it yourself or seek professional assistance.

9. Can resetting the OBDII code P0708 in a Mercury make it go away permanently?

- Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue is not addressed, the code is likely to return.

10. How can I prevent the OBDII code P0708 from reoccurring in my Mercury?

- Regular maintenance checks, addressing any transmission issues promptly, and ensuring the transmission range sensor is in good condition can help prevent the code from reoccurring.

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