AutoCodes – Mazda – P0189 Mazda

P0189 Mazda Code - Fuel Temperature Sensor B Circuit Intermittent

Quick Answer

The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. Common causes include Faulty Fuel Temperature Sensor, Fuel Temperature Sensor harness is open or shorted, Fuel Temperature Sensor 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
P0189 Mazda indicates Fuel Temperature Sensor B Circuit Intermittent.
Common causes
Common causes include Faulty Fuel Temperature Sensor, Fuel Temperature Sensor harness is open or shorted, Fuel Temperature Sensor 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,699
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P0189 Mazda Description

The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
OBDII Code P0189 Mazda - Fuel Temperature Sensor B Circuit Intermittent - AutoCodes.com
P0189 Mazda Code - Fuel Temperature Sensor B Circuit Intermittent

What are the Possible Causes of the DTC P0189 Mazda?

  • Faulty Fuel Temperature Sensor
  • Fuel Temperature Sensor harness is open or shorted
  • Fuel Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0189 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0189 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 P0189 Mazda code?

Need more information on how to fix the P0189 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0189 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 P0189 Mazda Code

1. What are the common symptoms of OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

The common symptoms include poor fuel economy, rough idling, engine misfires, and difficulty starting the vehicle.

2. What are some possible causes of the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

Possible causes include a faulty fuel temperature sensor, issues with the sensor wiring or connector, a problem with the fuel temperature sensor circuit, or a malfunction in the engine control module (ECM).

3. How can I diagnose the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

Diagnosing this code typically involves using a scan tool to read the code, checking the sensor's resistance with a multimeter, inspecting the sensor wiring and connector for damage, and testing the sensor circuit for continuity.

4. Are there any quick repair tips for fixing the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

Quick repair tips include checking and cleaning the sensor connector, ensuring the sensor is properly connected, checking for any visible damage to the sensor wiring, and resetting the ECM to see if the code reappears.

5. Can I continue driving my Mazda with the OBDII code P0189 related to the Fuel Temperature Sensor B Circuit Intermittent?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further engine problems and potential damage. It's best to address the issue promptly to prevent any long-term issues.

6. How much does it typically cost to repair the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

The cost of repair can vary depending on the exact cause of the issue. It may range from a simple sensor replacement, which can cost around $50-$200, to more complex wiring or ECM repairs, which can cost several hundred dollars.

7. Can I reset the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent myself?

Yes, you can reset the code using an OBDII scan tool or by disconnecting the car battery for a few minutes. However, it's important to note that simply resetting the code without addressing the underlying issue may result in it reoccurring.

8. How urgent is it to address the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

While the issue may not cause immediate harm to the vehicle, it is still important to address it in a timely manner to prevent further damage and ensure optimal engine performance and fuel efficiency.

9. Are there any preventive measures I can take to avoid the OBDII code P0189 related to the Fuel Temperature Sensor B Circuit Intermittent in my Mazda?

Regularly maintaining your vehicle, including checking for any signs of sensor or wiring damage, ensuring proper fuel system operation, and promptly addressing any related issues, can help prevent this code from occurring.

10. Can a mechanic easily fix the OBDII code P0189 in a Mazda related to the Fuel Temperature Sensor B Circuit Intermittent?

Yes, a qualified mechanic should be able to diagnose and repair this issue efficiently. They have the necessary tools and expertise to address the problem accurately and ensure that your Mazda is running smoothly again.

Discuss the causes and fixes for P0189 Mazda OBDII Code

Code P0189 Mazda comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

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

AutoCodes App on Google Play