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P0708 2015 Chevrolet Silverado Code - Transmission Range Switch Circuit High Voltage

Quick Answer

The P0708 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates a problem with the transmission range switch circuit having high voltage. Common causes include Faulty transmission range switch, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the circuit. 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 2015 Chevrolet Silverado indicates Transmission Range Switch Circuit High Voltage.
Common causes
Common causes include Faulty transmission range switch, Damaged wiring or connectors in the circuit, Corrosion or poor connections in the circuit.
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 13, 2024
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Code P0708 2015 Chevrolet Silverado Description

The P0708 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates a problem with the transmission range switch circuit having high voltage. The transmission range switch, also known as the neutral safety switch, is a crucial component that communicates the gear position to the vehicle's engine control module (ECM). This information is essential for the ECM to determine the appropriate shift points and ensure smooth operation of the transmission.

OBDII Code P0708 2015 Chevrolet Silverado - Transmission Range Switch Circuit High Voltage
P0708 2015 Chevrolet Silverado Code - Transmission Range Switch Circuit High Voltage

Common Causes of P0708 2015 Chevrolet Silverado

  1. Faulty transmission range switch
  2. Damaged wiring or connectors in the circuit
  3. Corrosion or poor connections in the circuit
  4. Issues with the ECM
  5. Electrical system malfunctions

Symptoms of P0708 2015 Chevrolet Silverado

  1. Harsh shifting between gears
  2. Delayed or erratic shifting behavior
  3. Inability to shift gears
  4. Vehicle not starting in Park or Neutral
  5. Check Engine Light illuminated on the dashboard

How to Fix P0708 2015 Chevrolet Silverado

  1. Begin by diagnosing the root cause of the high voltage in the transmission range switch circuit using a diagnostic scanner.
  2. Inspect the transmission range switch for any signs of damage or malfunction. Replace the switch if necessary.
  3. Check the wiring and connectors in the circuit for any corrosion, damage, or loose connections. Repair or replace as needed.
  4. Clear the DTC from the ECM's memory and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the high voltage condition.

Cost to Fix P0708 2015 Chevrolet Silverado

The typical repair costs for addressing a P0708 code in a 2015 Chevrolet Silverado can range from $150 to $400, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for P0708 2015 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 2015 Chevrolet Silverado Code

1. What does the OBDII code P0708 mean on a 2015 Chevrolet Silverado?

Code P0708 indicates a high voltage issue in the transmission range switch circuit, which monitors the gear selector position.

2. What are the common symptoms of code P0708 on a 2015 Chevrolet Silverado?

Symptoms may include difficulty shifting gears, the transmission staying in limp mode, the check engine light illuminating, or incorrect gear position display.

3. What causes the P0708 code on a 2015 Chevrolet Silverado?

Common causes include a faulty transmission range sensor, damaged wiring or connectors in the circuit, or issues with the powertrain control module (PCM).

4. Can I still drive my 2015 Chevrolet Silverado with code P0708?

Driving is possible but not recommended, as the transmission may not shift properly, leading to reduced performance and potential safety risks.

5. How do I diagnose the P0708 code on my 2015 Chevrolet Silverado?

Start by inspecting the transmission range sensor, checking for damaged wiring or connectors, and testing the circuit with a multimeter for high voltage readings.

6. How do I fix code P0708 on a 2015 Chevrolet Silverado?

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

7. Is the transmission range sensor expensive to replace on a 2015 Chevrolet Silverado?

The cost varies but typically ranges from $150 to $300 for parts and labor, depending on your location and the repair shop.

8. Can a dead battery cause code P0708 on a 2015 Chevrolet Silverado?

A dead or weak battery is unlikely to cause this code directly but could lead to electrical issues that affect the transmission range sensor circuit.

9. Will clearing the code fix P0708 on a 2015 Chevrolet Silverado?

Clearing the code without addressing the underlying issue will only temporarily remove the warning; the code will likely return.

10. Does code P0708 affect fuel efficiency on a 2015 Chevrolet Silverado?

Yes, if the transmission is stuck in limp mode or not shifting properly, it can negatively impact fuel efficiency.

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