AutoCodes – Saturn – P0708 Saturn

P0708 Saturn Code - Transmission Range Switch Circuit High Voltage

Quick Answer

The Internal Mode Switch (IMS) consists of 5 internal switches, A, B, C, P and Neutral Start (NS). Common causes include Faulty Transmission Range Switch, Misadjusted Transmission Range Switch, Transmission Range Switch harness is open or shorted. 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 Saturn indicates Transmission Range Switch Circuit High Voltage.
Common causes: Common causes include Faulty Transmission Range Switch, Misadjusted Transmission Range Switch, Transmission Range Switch harness is open or shorted.
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 15,443

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 04, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0708 Saturn Description

The Internal Mode Switch (IMS) consists of 5 internal switches, A, B, C, P and Neutral Start (NS). The IMS is attached to the selector shaft, and the switches change state depending on the position of the selector shaft. The Transmission Control Module (TCM) uses four of the internal switches, A, B, C, and P, to determine the gear range that is selected. The ECM uses the NS switch as confirmation that the transmission is in neutral or park before the engine starter is engaged.

OBDII Code P0708 Saturn - Transmission Range Switch Circuit High Voltage - AutoCodes.com — P0708 Saturn Code - Transmission Range Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0708 Saturn?

Faulty Transmission Range Switch
Misadjusted Transmission Range Switch
Transmission Range Switch harness is open or shorted
Transmission Range Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P0708 Saturn?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0708 Saturn 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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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.