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P0708 2017 Chevrolet Silverado Code - Transmission Range Switch Circuit High Voltage

Quick Answer

The P0708 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a Transmission Range Switch Circuit High Voltage. Common causes include Faulty transmission range sensor, Damaged wiring or connectors in the transmission range switch circuit, Corrosion or poor connections in the electrical 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 2017 Chevrolet Silverado indicates Transmission Range Switch Circuit High Voltage.
Common causes
Common causes include Faulty transmission range sensor, Damaged wiring or connectors in the transmission range switch circuit, Corrosion or poor connections in the electrical 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code P0708 2017 Chevrolet Silverado Description

The P0708 diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a Transmission Range Switch Circuit High Voltage. This code is related to the transmission range sensor, also known as the transmission range switch or neutral safety switch. The transmission range sensor is responsible for informing the vehicle's computer system about the gear position selected by the driver. This information is crucial for the proper operation of the transmission, engine, and other vehicle systems.

OBDII Code P0708 2017 Chevrolet Silverado - Transmission Range Switch Circuit High Voltage
P0708 2017 Chevrolet Silverado Code - Transmission Range Switch Circuit High Voltage

Common Causes of P0708 2017 Chevrolet Silverado

  1. Faulty transmission range sensor
  2. Damaged wiring or connectors in the transmission range switch circuit
  3. Corrosion or poor connections in the electrical system
  4. Issues with the vehicle's computer or control module
  5. Environmental factors such as water intrusion or debris affecting the sensor

Symptoms of P0708 2017 Chevrolet Silverado

  1. Difficulty starting the vehicle
  2. Erratic shifting behavior
  3. Inability to shift gears properly
  4. Vehicle going into "limp mode"
  5. Check Engine Light illuminated on the dashboard

How to Fix P0708 2017 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the high voltage in the transmission range switch circuit using a scan tool to read the DTC and perform electrical testing.
  2. Inspect the transmission range sensor, wiring, and connectors for any visible damage, corrosion, or loose connections.
  3. Test the transmission range sensor's operation using a multimeter to ensure it is sending the correct signals to the vehicle's computer.
  4. Replace the transmission range sensor if it is found to be faulty, damaged, or not functioning correctly.
  5. Clear the DTC from the vehicle's computer memory and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0708 2017 Chevrolet Silverado

The typical repair costs for addressing a P0708 code on a 2017 Chevrolet Silverado can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of a new transmission range sensor, any necessary wiring repairs or replacements, and the labor involved in diagnosing and repairing the problem. It's important to note that actual repair costs may vary based on the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. It is advisable to consult with a qualified mechanic or repair shop for a more accurate cost estimate based on your specific situation.

What does this mean?

Tech Notes for P0708 2017 Chevrolet Silverado

The Internal Mode Switch (IMS) is mounted to the manual shift shaft detent lever as an assembly. The components of the detent lever/IMS assembly cannot be individually serviced. When the IMS needs replacing, the entire assembly must be replaced.

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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 2017 Chevrolet Silverado Code

1. What does the OBDII code P0708 mean on a 2017 Chevrolet Silverado?

P0708 indicates a problem with the Transmission Range Switch Circuit, specifically that it is reading high voltage, which can affect the vehicle's ability to detect the correct gear.

2. What are the common symptoms of code P0708 on a 2017 Chevy Silverado?

Symptoms may include difficulty shifting gears, the transmission being stuck in one gear, erratic shifting, or the vehicle failing to start.

3. What causes the P0708 code to appear on a 2017 Chevrolet Silverado?

Common causes include a faulty transmission range sensor, damaged wiring or connectors, or an issue with the vehicle’s powertrain control module (PCM).

4. Can a P0708 code cause drivability issues?

Yes, it can cause problems such as improper gear shifting, reduced performance, or a failure of the transmission to engage correctly.

5. How can I diagnose the P0708 code on my 2017 Silverado?

Start by inspecting the transmission range sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to check voltage levels and a scan tool to monitor live data.

6. Is it safe to drive a 2017 Chevrolet Silverado with the P0708 code?

Driving with this code is not recommended, as it can lead to further transmission damage and unsafe driving conditions.

7. How do I fix the P0708 code on a 2017 Chevy Silverado?

Repairs may include replacing the transmission range sensor, repairing or replacing damaged wiring, or reprogramming the PCM if necessary.

8. How much does it cost to repair the P0708 code on a 2017 Silverado?

Repair costs vary but typically range from $150 to $400 depending on whether the sensor, wiring, or other components need replacement.

9. Can a faulty Transmission Range Sensor trigger the P0708 code?

Yes, a malfunctioning sensor is one of the most common causes of this code.

10. Will clearing the P0708 code fix the issue on a 2017 Chevrolet Silverado?

Clearing the code may temporarily remove it, but the underlying issue must be resolved to prevent the code from returning.

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