AutoCodes – Mercedes-Benz – P0708 Mercedes-Benz

P0708 Mercedes-Benz Code - Transmission Range Sensor Circuit High Input

Quick Answer

The park/neutral position (PNP) switch includes a transmission range switch. Common causes include Faulty Park/neutral position switch, Misadjusted park/neutral position switch, Park/neutral position switch harness is open or shorted. 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 Faulty Park/neutral position switch, Misadjusted park/neutral position switch, Park/neutral position switch harness is open or shorted.
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 Popularity 4,293

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0708 Mercedes-Benz Description

The park/neutral position (PNP) switch includes a transmission range switch. The transmission range switch detects the selector lever position when the shift lever is in the N or P shift position and sends a signal to the Transmission Control Module (TCM).

OBDII Code P0708 Mercedes-Benz - Transmission Range Sensor Circuit High Input - AutoCodes.com — P0708 Mercedes-Benz Code - Transmission Range Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0708 Mercedes-Benz?

Faulty Park/neutral position switch
Misadjusted park/neutral position switch
Park/neutral position switch harness is open or shorted
Park/neutral position switch circuit poor electrical connection

How to Fix the DTC P0708 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 P0708 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.

Need more information about the P0708 Mercedes-Benz code?

Need more information on how to fix the P0708 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0708 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 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 $100â€“$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.