AutoCodes – Mazda – P1749 Mazda

P1749 Mazda Code - Electronic Pressure Control Solenoid Failed Low Conditions

Quick Answer

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) detects that the Torque Converter Clutch (TCC) circuit failed low. Common causes include Faulty Line Pressure Solenoid, Line Pressure Solenoid harness is open or shorted, Line Pressure Solenoid 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: P1749 Mazda indicates Electronic Pressure Control Solenoid Failed Low Conditions.
Common causes: Common causes include Faulty Line Pressure Solenoid, Line Pressure Solenoid harness is open or shorted, Line Pressure Solenoid 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.

Save to My Repairs My Repairs

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

Code Popularity 1,904

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 Sep 14, 2019

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 P1749 Mazda Description

With the engine running in gear at cruise speed and the Powertrain Control Module (PCM) detects that the Torque Converter Clutch (TCC) circuit failed low.

OBDII Code P1749 Mazda - Electronic Pressure Control Solenoid Failed Low Conditions - AutoCodes.com — P1749 Mazda Code - Electronic Pressure Control Solenoid Failed Low Conditions

What does this mean?

What are the Possible Causes of the DTC P1749 Mazda?

Faulty Line Pressure Solenoid
Line Pressure Solenoid harness is open or shorted
Line Pressure Solenoid circuit poor electrical connection

How to Fix the DTC P1749 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 P1749 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 P1749 Mazda code?

Need more information on how to fix the P1749 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1749 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 P1749 Mazda Code

1. What are the common symptoms of OBDII code P1749 (Mazda) related to Electronic Pressure Control Solenoid failure?

- Common symptoms include harsh shifting, transmission slipping, poor fuel economy, and an illuminated Check Engine light.

2. What are the possible causes of the Electronic Pressure Control Solenoid failing low in a Mazda vehicle?

- Potential causes include a faulty electronic pressure control solenoid, low transmission fluid level, dirty transmission fluid, or wiring/connectivity issues.

3. How can I diagnose the Electronic Pressure Control Solenoid failure causing OBDII code P1749 in my Mazda?

- A thorough diagnosis involves checking the transmission fluid level and condition, inspecting the wiring and connectors, and testing the electronic pressure control solenoid using a multimeter.

4. Can driving with OBDII code P1749 (Mazda) cause further damage to the vehicle?

- Driving with this code may lead to long-term transmission damage, reduced fuel efficiency, and unsafe driving conditions. It's best to address the issue promptly.

5. Is it safe to continue driving my Mazda with the Electronic Pressure Control Solenoid failing low?

- It is not recommended to drive the vehicle with this issue, as it can lead to transmission problems and potential safety hazards. Have the problem diagnosed and repaired as soon as possible.

6. Will resetting the Check Engine light make OBDII code P1749 (Mazda) go away permanently?

- Resetting the light may temporarily clear the code, but if the underlying issue causing the code is not fixed, it will likely reappear once the vehicle is driven again.

7. How much does it typically cost to repair OBDII code P1749 (Mazda) related to the Electronic Pressure Control Solenoid?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.

8. Can I fix the Electronic Pressure Control Solenoid issue causing OBDII code P1749 in my Mazda myself?

- If you have experience with automotive repairs and access to the necessary tools, you may be able to replace the solenoid yourself. However, it's recommended to consult a professional if you're unsure.

9. Are there any preventative maintenance tips to avoid OBDII code P1749 (Mazda) in the future?

- Regularly checking and maintaining the transmission fluid level and condition, as well as addressing any transmission issues promptly, can help prevent electronic pressure control solenoid failures.

10. How long does it typically take to repair OBDII code P1749 (Mazda) related to the Electronic Pressure Control Solenoid?

- The repair time can vary depending on the exact cause of the issue and the technician's efficiency, but it may take anywhere from 1 to 3 hours to complete the repair.