Engine-Codes.com
Engine-Codes – GMC – P0706 GMC

P0706 GMC Code - Transmission Range Switch Performance

Quick Answer

The P0706 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the transmission range switch, also known as the neutral safety switch. Common causes include Worn internal contacts within the transmission range switch, Contamination of the switch contacts with debris or fluid, Faulty wiring or electrical connections to the switch. 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
P0706 GMC indicates Transmission Range Switch Performance.
Common causes
Common causes include Worn internal contacts within the transmission range switch, Contamination of the switch contacts with debris or fluid, Faulty wiring or electrical connections to the switch.
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 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0706 GMC Description

The P0706 diagnostic trouble code (DTC) for GMC vehicles indicates a problem with the transmission range switch, also known as the neutral safety switch. This switch is responsible for telling the vehicle's computer which gear the transmission is in, allowing the engine to start only in park or neutral. The switch also helps the transmission control module (TCM) adjust shift points and torque converter lockup. When this switch malfunctions, it can cause a variety of issues with the vehicle's transmission and overall performance.

OBDII Code P0706 GMC - Transmission Range Switch Performance
P0706 GMC Code - Transmission Range Switch Performance

Common Causes of P0706 GMC

  1. Worn internal contacts within the transmission range switch
  2. Contamination of the switch contacts with debris or fluid
  3. Faulty wiring or electrical connections to the switch
  4. Mechanical damage to the shift linkage affecting switch operation
  5. Faulty transmission control module (TCM) causing incorrect signals to the switch

Symptoms of P0706 GMC

  1. Harsh shifting between gears
  2. Delayed or erratic shifting
  3. Vehicle not starting in park or neutral
  4. Check engine light illuminated
  5. Vehicle going into limp mode

How to Fix P0706 GMC

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific DTC and check the transmission range switch's functionality.
  2. Inspect the switch for any visible signs of damage, contamination, or wear.
  3. Test the switch's continuity and resistance to ensure proper operation.
  4. If the switch is faulty, replace it with a new OEM or aftermarket unit.
  5. Clear the DTC from the vehicle's computer memory and test drive the vehicle to ensure proper shifting and operation.

Cost to Fix P0706 GMC

The typical cost to repair a transmission range switch performance issue on a GMC vehicle can range from $150 to $400, including parts and labor. However, the actual cost may vary depending on the vehicle's make and model, the location of the repair shop, and the specific diagnosis and repair process required. It is recommended to consult with a certified mechanic or dealership for a more accurate estimate based on your vehicle's specific needs. Labor rates at auto repair shops can range from $80 to $150 per hour, with higher rates in metropolitan areas or at dealerships and lower rates at independent shops.

What does this mean?

Tech Notes for P0706 GMC

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.





User Submitted Video

Need more information about the P0706 GMC code?

Need more information on how to fix the P0706 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0706 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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 P0706 GMC Code

1. What does the OBDII code P0706 mean on a GMC vehicle?

P0706 indicates a problem with the Transmission Range Sensor (TRS), specifically that its signal is out of range or not performing as expected.

2. What are the symptoms of code P0706 on a GMC?

Common symptoms include difficulty shifting gears, erratic transmission behavior, the vehicle starting in the wrong gear, or the transmission staying in limp mode.

3. What causes P0706 in a GMC?

Causes include a faulty Transmission Range Sensor, damaged wiring or connectors, misaligned sensor installation, or internal transmission issues.

4. Is it safe to drive with code P0706 on a GMC?

Driving with P0706 can lead to unpredictable transmission behavior, which may not be safe. It's best to address the issue promptly.

5. How do I diagnose code P0706 on my GMC?

Diagnosis involves inspecting the TRS and its wiring for damage, checking for proper alignment, testing the sensor with a multimeter, and scanning for other related codes.

6. Can a bad Transmission Range Sensor cause my GMC not to start?

Yes, if the TRS cannot correctly detect the gear position (such as park or neutral), the vehicle may fail to start.

7. What tools are needed to fix code P0706 on a GMC?

You may need an OBDII scanner, a multimeter, basic hand tools, and possibly a service manual to guide sensor removal and installation.

8. How much does it cost to repair code P0706 on a GMC?

Repair costs vary but typically range from $150 to $400, depending on whether the TRS needs replacement or if there are wiring issues.

9. Can a software update fix code P0706 on a GMC?

In some cases, a software update for the transmission control module (TCM) might resolve the issue, but this depends on your specific vehicle and its history.

10. What happens if I ignore code P0706 on my GMC?

Ignoring P0706 can lead to worsening transmission issues, reduced fuel efficiency, and potential long-term damage to the transmission system.

Discuss the causes and fixes for P0706 GMC OBDII Code

Submit a New Comment

Code P0706 GMC comments

No comments found for this page.