P0708 2014 GMC Sierra Code - Transmission Range Switch Circuit High Voltage
Quick Answer
The P0708 diagnostic trouble code (DTC) for a 2014 GMC Sierra refers to a Transmission Range Switch Circuit High Voltage. Common causes include Faulty transmission range switch, Damaged wiring or connectors in the transmission range switch circuit, Malfunctioning transmission control module. 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 2014 GMC Sierra indicates Transmission Range Switch Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission range switch, Damaged wiring or connectors in the transmission range switch circuit, Malfunctioning transmission control module.
- 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 2014 GMC Sierra Description
The P0708 diagnostic trouble code (DTC) for a 2014 GMC Sierra refers to a Transmission Range Switch Circuit High Voltage. The transmission range switch, also known as the neutral safety switch, is responsible for ensuring that the transmission is in the correct gear before allowing the vehicle to start. When the transmission range switch detects a high voltage in its circuit, it triggers the P0708 code, indicating a problem with the switch.
Common Causes of P0708 2014 GMC Sierra
- Faulty transmission range switch
- Damaged wiring or connectors in the transmission range switch circuit
- Malfunctioning transmission control module
- Corrosion or moisture in the transmission range switch circuit
- Poor electrical connections in the circuit
Symptoms of P0708 2014 GMC Sierra
- Vehicle not starting
- Stalling while driving
- Difficulty shifting gears
- Transmission stuck in a particular gear
- Check Engine Light illuminated on the dashboard
How to Fix P0708 2014 GMC Sierra
- Perform a thorough diagnostic scan to confirm the P0708 code and identify the specific cause of the issue.
- Inspect the transmission range switch and its circuit for any visible damage or corrosion. Replace the switch if necessary.
- Check the wiring and connectors in the transmission range switch circuit for any damage or loose connections. Repair or replace as needed.
- Test the transmission control module to ensure it is functioning correctly. Replace if faulty.
- Clear the DTC and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P0708 2014 GMC Sierra
The cost of repairing a P0708 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing a transmission range switch can cost between $150 and $300, including parts and labor. However, if the issue is more complex and involves the transmission control module or wiring repairs, the cost can increase significantly.
Tech Notes for P0708 2014 GMC Sierra
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Frequently Asked Questions about P0708 2014 GMC Sierra Code
1. What does the OBDII code P0708 mean on a 2014 GMC Sierra?
P0708 indicates a "Transmission Range Switch Circuit High Voltage" issue, meaning the transmission range sensor is reporting a voltage outside the expected range.
2. What are the common symptoms of code P0708 in a 2014 GMC Sierra?
Symptoms may include the transmission not shifting properly, the vehicle being stuck in one gear, the check engine light turning on, or erratic gear indicator lights.
3. What causes the P0708 code in a 2014 GMC Sierra?
Common causes include a faulty transmission range sensor, damaged wiring or connectors, a short circuit, or a malfunctioning PCM (Powertrain Control Module).
4. Can I drive my 2014 GMC Sierra with a P0708 code?
Driving with a P0708 code is not recommended, as it can cause transmission damage or unsafe driving conditions due to erratic shifting.
5. How do I diagnose the P0708 code on a 2014 GMC Sierra?
Start by checking the transmission range sensor and its wiring for damage. Then, use a multimeter to test the sensor’s signal and inspect the PCM for any faults.
6. How much does it cost to fix a P0708 code on a 2014 GMC Sierra?
Repair costs vary but typically range from $200 to $450, depending on whether the issue is a sensor replacement, wiring repair, or PCM programming.
7. Can a bad battery cause the P0708 code in a 2014 GMC Sierra?
While uncommon, a weak or failing battery can contribute to electrical issues, potentially causing incorrect sensor voltage readings.
8. How do I reset the P0708 code on my 2014 GMC Sierra?
After fixing the issue, you can reset the code using an OBDII scanner. If the problem persists, the code will reappear.
9. What role does the transmission range sensor play in a 2014 GMC Sierra?
The transmission range sensor detects the gear selector position and sends the information to the PCM for proper transmission control.
10. Can a P0708 code damage the transmission on a 2014 GMC Sierra?
If unresolved, a P0708 code can lead to improper shifting, which may cause long-term transmission damage. Prompt diagnosis and repair are essential.
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