AutoCodes – Volkswagen – P0791 Volkswagen

P0791 Volkswagen Code - Intermediate Shaft Speed Sensor 'A' Circuit

Quick Answer

This sensor detects the rotation speed of the input turbine. Common causes include Faulty Intermediate Shat Speed Sensor 'A', Intermediate Shat Speed Sensor 'A' harness is open or shorted, Intermediate Shat Speed Sensor 'A' 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: P0791 Volkswagen indicates Intermediate Shaft Speed Sensor 'A' Circuit.
Common causes: Common causes include Faulty Intermediate Shat Speed Sensor 'A', Intermediate Shat Speed Sensor 'A' harness is open or shorted, Intermediate Shat Speed Sensor 'A' 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 5,856

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 May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0791 Volkswagen Description

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the Engine Control Module (ECM) detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

OBDII Code P0791 Volkswagen - Intermediate Shaft Speed Sensor 'A' Circuit - AutoCodes.com — P0791 Volkswagen Code - Intermediate Shaft Speed Sensor 'A' Circuit

What does this mean?

What are the Possible Causes of the DTC P0791 Volkswagen?

Faulty Intermediate Shat Speed Sensor 'A'
Intermediate Shat Speed Sensor 'A' harness is open or shorted
Intermediate Shat Speed Sensor 'A' circuit poor electrical connection

How to Fix the DTC P0791 Volkswagen?

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 P0791 Volkswagen 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.