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P0706 Chevrolet 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 Chevrolet 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.
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Code Popularity 40,617
How popular is this code, among other codes? Medium
What is this?
Table of contents Created and updated by William Orellana on Jul 29, 2022
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Code P0706 Chevrolet Description

The Transmission Internal Mode Switch (IMS) consists of 5 internal switches, A, B, C, P, and Neutral Start.  The Transmission Internal Mode Switch is attached to the selector shaft, and the switches change state depending on the position of the selector shaft. The Transmission Control Module (TCM) supplies a signal circuit to each of the Transmission Internal Mode Switches A, B, C, and P. The TCM uses the switch states to determine the gear range that is selected. The state of each input is displayed on the scan tool TCM Internal Mode Switch A/B/C/P parameter. The internal mode switch input parameters represented are transmission range Signal A, Signal B, Signal C, and Signal P.
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.
OBDII Code P0706 Chevrolet - Transmission Range Switch Performance - AutoCodes.com
P0706 Chevrolet Code - Transmission Range Switch Performance
What does this mean?

What are the Possible Causes of the DTC P0706 Chevrolet?

  • 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 Chevrolet?

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.

What does this mean?

Code Tech Notes

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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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0706 Chevrolet 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 Chevrolet 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 Chevrolet Code

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  • I have a 2003 Chevy Suburban. PO706 code was given after check engine light came on. Is this an easy fix?

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