P0706 2018 GMC Sierra Code - Transmission Range Switch Performance
Quick Answer
The Transmission Internal Mode Switch (IMS) consists of 5 internal switches, A, B, C, P, and Neutral Start. Common causes include Faulty Transmission Internal Mode Switch (IMS), Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch circuit poor electrical connection. 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 2018 GMC Sierra indicates Transmission Range Switch Performance.
- Common causes
- Common causes include Faulty Transmission Internal Mode Switch (IMS), Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch circuit poor electrical connection.
- 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.
Code P0706 2018 GMC Sierra Description
The Engine Control Module (ECM) supplies a signal circuit to the neutral start switch. The ECM uses the state of the neutral start switch state as confirmation that the transmission is in neutral or park before the engine starter is engaged.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects engine cranking when the IMS does not indicate park or neutral for 0.2 s.
What are the Possible Causes of the DTC P0706 2018 GMC Sierra?
- Faulty Transmission Internal Mode Switch (IMS)
- Transmission Internal Mode Switch harness is open or shorted
- Transmission Internal Mode Switch circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0706 2018 GMC Sierra?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0706 2018 GMC Sierra 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.
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Frequently Asked Questions about P0706 2018 GMC Sierra Code
1. What does OBDII code P0706 mean for a 2018 GMC Sierra?
P0706 indicates an issue with the Transmission Range Switch, which monitors the gear selection and sends signals to the vehicle's computer.
2. What are common symptoms of code P0706 in a 2018 GMC Sierra?
Symptoms include erratic shifting, inability to start in certain gears, transmission stuck in limp mode, or the check engine light illuminating.
3. What causes code P0706 in a 2018 GMC Sierra?
Common causes include a faulty Transmission Range Switch, damaged wiring or connectors, or issues with the transmission control module.
4. Can driving with code P0706 damage my 2018 GMC Sierra?
Yes, driving with this code can lead to further transmission issues or unsafe driving conditions due to erratic gear shifting.
5. How do I diagnose code P0706 in my 2018 GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the Transmission Range Switch, and check the wiring and connectors for damage or corrosion.
6. How do I fix code P0706 on a 2018 GMC Sierra?
Repairs may include replacing the Transmission Range Switch, repairing damaged wiring, or updating the transmission control module software.
7. How much does it cost to repair code P0706 on a 2018 GMC Sierra?
The repair cost can range from $200 to $500, depending on whether the Transmission Range Switch or wiring needs replacement.
8. Can low transmission fluid cause code P0706 on a 2018 GMC Sierra?
Low transmission fluid typically won't cause P0706 directly, but it can cause other transmission-related issues that may trigger similar symptoms.
9. Do I need a professional to fix code P0706 on my 2018 GMC Sierra?
While DIY repairs are possible for some, diagnosing and fixing transmission-related issues often requires professional expertise and specialized tools.
10. Is resetting the check engine light enough to resolve code P0706 on a 2018 GMC Sierra?
No, resetting the light without addressing the underlying issue will not resolve the problem and the code is likely to return.
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