AutoCodes – Mazda – P1935 Mazda

P1935 Mazda Code - Fuel Additive Level Low

Quick Answer

P1935 Mazda indicates Fuel Additive Level Low. Common causes include Faulty Fuel Additive Level, Fuel Additive Level harness is open or shorted, Fuel Additive Level 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: P1935 Mazda indicates Fuel Additive Level Low.
Common causes: Common causes include Faulty Fuel Additive Level, Fuel Additive Level harness is open or shorted, Fuel Additive Level 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 4,287

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 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1935 Mazda Description

OBDII Code P1935 Mazda - Fuel Additive Level Low - AutoCodes.com — P1935 Mazda Code - Fuel Additive Level Low

What does this mean?

What are the Possible Causes of the DTC P1935 Mazda?

Faulty Fuel Additive Level
Fuel Additive Level harness is open or shorted
Fuel Additive Level circuit poor electrical connection

How to Fix the DTC P1935 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 P1935 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 P1935 Mazda code?

Need more information on how to fix the P1935 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1935 Mazda Code

1. What are the common symptoms of OBDII code P1935 in a Mazda related to low fuel additive level?

The common symptoms include the check engine light illuminating, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What causes the OBDII code P1935 in a Mazda indicating low fuel additive level?

The code is typically triggered when the vehicle's computer detects a low level of fuel additive, which is essential for proper emissions control and fuel system operation.

3. How can I diagnose the OBDII code P1935 in my Mazda related to low fuel additive level?

Diagnosing this code usually involves checking the fuel additive tank level sensor, inspecting the fuel additive tank for leaks or damage, and verifying the proper operation of the fuel additive system components.

4. Can I continue driving my Mazda with the OBDII code P1935 indicating low fuel additive level?

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent potential damage to the emissions system and ensure optimal engine performance.

5. How can I reset the OBDII code P1935 in my Mazda after addressing the low fuel additive level?

Once the issue causing the low fuel additive level is resolved, the code can typically be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

6. Is it safe to ignore the OBDII code P1935 related to low fuel additive level in my Mazda?

Ignoring this code can lead to increased emissions, decreased fuel efficiency, and potential long-term damage to the vehicle's emissions system, so it is not recommended to ignore it.

7. Are there any DIY repair tips for addressing the OBDII code P1935 indicating low fuel additive level in a Mazda?

DIY repair tips may include checking the fuel additive tank for visible issues, ensuring the tank is properly sealed, and verifying the electrical connections to the fuel additive system components.

8. How much does it typically cost to repair the OBDII code P1935 in a Mazda due to low fuel additive level?

The cost of repair can vary depending on the specific cause of the low fuel additive level, but it may involve replacing the fuel additive tank, sensor, or related components, with costs ranging from a few hundred to over a thousand dollars.

9. Can extreme weather conditions affect the OBDII code P1935 related to low fuel additive level in a Mazda?

Extreme temperature fluctuations or exposure to harsh environmental conditions can potentially impact the fuel additive system components, leading to issues with fuel additive levels and triggering the code.

10. How often should the fuel additive level be checked in a Mazda to prevent the OBDII code P1935 from appearing?

It is recommended to follow the manufacturer's maintenance schedule for inspecting and replenishing the fuel additive level to ensure proper operation of the emissions system and prevent the recurrence of the P1935 trouble code.