AutoCodes – Generic – P1901

P1901 Code - Turbine Shaft Speed Sensor Circuit Intermittent

Quick Answer

The Turbine Shaft Speed (TSS) sensor is a Hall-effect pickup that sends a signal to the Powertrain Control Module (PCM) or Transmission Control Module (TCM) that indicates transaxle turbine shaft input speed. Common causes include Turbine Shaft Speed (TSS) sensor not installed correctly, Faulty Turbine Shaft Speed sensor, Turbine Shaft Speed sensor 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: P1901 indicates Turbine Shaft Speed Sensor Circuit Intermittent.
Common causes: Common causes include Turbine Shaft Speed (TSS) sensor not installed correctly, Faulty Turbine Shaft Speed sensor, Turbine Shaft Speed sensor 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 29,920

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 Jul 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1901 Description

The Turbine Shaft Speed (TSS) sensor is a Hall-effect pickup that sends a signal to the Powertrain Control Module (PCM) or Transmission Control Module (TCM) that indicates transaxle turbine shaft input speed. The TSS sensor provides converter turbine speed information for the Torque Converter Clutch strategy. Also used in determining static Line Pressure Control (LPC) pressure settings. The Diagnostic Trouble Code (DTC) will set when the TSS sensor signal to the PCM is irregular or interrupted.

OBDII Code P1901 - Turbine Shaft Speed Sensor Circuit Intermittent - AutoCodes.com — P1901 Code - Turbine Shaft Speed Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P1901?

Turbine Shaft Speed (TSS) sensor not installed correctly
Faulty Turbine Shaft Speed sensor
Turbine Shaft Speed sensor harness is open or shorted
Turbine Shaft Speed sensor circuit poor electrical connection

How to Fix the DTC P1901?

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 P1901 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.

Need more information about the P1901 code?

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Information for Specific Makes

P1901 Audi — Engine Coolant Blower Motor Run-On Relay Short To Positive
P1901 Ford — Turbine Shaft Speed Sensor Circuit Intermittent
P1901 Lincoln — Turbine Shaft Speed Sensor Circuit Intermittent
P1901 Mazda — Turbine Shaft Speed Sensor Intermittent
P1901 Mercury — Turbine Shaft Speed Sensor Circuit Intermittent
P1901 Saab — CAN Data Bus Multifunction Control Module 1
P1901 Volkswagen — Engine Coolant Blower Motor Run-On Relay Short To Positive

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.