AutoCodes – Mazda – P1900 Mazda

P1900 Mazda Code - Turbine Shaft Speed Sensor Intermittent

Quick Answer

The Output Shaft Speed (OSS) sensor provides the Powertrain Control Module (PCM) with information about the rotational speed of an output shaft. Common causes include Output Shaft Speed (OSS) not installed properly, Faulty Output Shaft Speed sensor, Output 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: P1900 Mazda indicates Turbine Shaft Speed Sensor Intermittent.
Common causes: Common causes include Output Shaft Speed (OSS) not installed properly, Faulty Output Shaft Speed sensor, Output 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,697

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
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1900 Mazda Description

The Output Shaft Speed (OSS) sensor provides the Powertrain Control Module (PCM) with information about the rotational speed of an output shaft. The PCM uses the information to control and diagnose powertrain behavior. In some applications, the sensor is also used as the source of vehicle speed. The sensor may be physically located in different places on the vehicle, depending upon the specific application. The design of each speed sensor is unique and depends on which powertrain control feature uses the information that is generated. The Diagnostic Trouble Code (DTC) will set when the OSS sensor signal to the PCM is irregular or interrupted.

OBDII Code P1900 Mazda - Turbine Shaft Speed Sensor Intermittent - AutoCodes.com — P1900 Mazda Code - Turbine Shaft Speed Sensor Intermittent

What does this mean?

What are the Possible Causes of the DTC P1900 Mazda?

Output Shaft Speed (OSS) not installed properly
Faulty Output Shaft Speed sensor
Output Shaft Speed sensor harness is open or shorted
Output Shaft Speed sensor circuit poor electrical connection

How to Fix the DTC P1900 Mazda?

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 P1900 Mazda 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 P1900 Mazda code?

Need more information on how to fix the P1900 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1900 Mazda code diagnosed by a professional: Find a repair shop in your area

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 P1900 Mazda Code

1. What does the OBDII code P1900 on a Mazda mean?

P1900 indicates an intermittent issue with the Turbine Shaft Speed Sensor, which monitors the rotational speed of the transmission's input shaft.

2. What are the common symptoms of code P1900 in a Mazda?

Symptoms may include erratic or delayed shifting, transmission slipping, poor acceleration, or the activation of the Check Engine Light.

3. What causes the P1900 code to be triggered?

Possible causes include a faulty Turbine Shaft Speed Sensor, damaged wiring or connectors, or issues with the transmission control module (TCM).

4. Can I drive my Mazda with a P1900 code?

Driving with this code is not recommended as it can lead to transmission damage, reduced performance, or unsafe driving conditions.

5. How do I diagnose a P1900 code on my Mazda?

Diagnosing involves scanning for codes, inspecting the Turbine Shaft Speed Sensor, checking wiring and connectors for damage, and testing the sensorâ€™s electrical output.

6. How do I fix the P1900 code in a Mazda?

Repairs may include replacing the Turbine Shaft Speed Sensor, repairing damaged wiring, or reprogramming/updating the transmission control module.

7. What tools are required to troubleshoot the P1900 code?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and possibly a repair manual for your specific Mazda model.

8. How much does it cost to fix a P1900 code on a Mazda?

Repair costs vary but typically range from $150 to $400, depending on whether the sensor, wiring, or TCM requires repair or replacement.

9. Can a dirty transmission fluid cause the P1900 code?

While unlikely, dirty or low transmission fluid can contribute to sensor issues or transmission performance problems, so itâ€™s worth checking.

10. Does the P1900 code mean the transmission needs replacement?

Not necessarily. This code usually points to a sensor or electrical issue rather than a complete transmission failure. Proper diagnosis is essential.

Discuss the causes and fixes for P1900 Mazda OBDII Code

Submit a New Comment

Code P1900 Mazda comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.