P0706 GMC 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 GMC 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 GMC 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 GMC?
- 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 GMC?
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
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0706 GMC 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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Information for Specific GMC Models
- P0706 2014 GMC Sierra — Transmission Range Switch Performance
- P0706 2015 GMC Sierra — Transmission Range Switch Performance
- P0706 2016 GMC Sierra — Transmission Range Switch Performance
- P0706 2017 GMC Sierra — Transmission Range Switch Performance
- P0706 2018 GMC Sierra — Transmission Range Switch Performance
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
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