AutoCodes – Mazda – P1443 Mazda

P1443 Mazda Code - Evaporative Emission Control System Large leak detected

Quick Answer

P1443 Mazda indicates Evaporative Emission Control System Large leak detected. Common causes include Gas cap loose or missing, Faulty FTP Sensor, FTP 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
P1443 Mazda indicates Evaporative Emission Control System Large leak detected.
Common causes
Common causes include Gas cap loose or missing, Faulty FTP Sensor, FTP 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 9,793
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 22, 2019
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Code P1443 Mazda Description

OBDII Code P1443 Mazda - Evaporative Emission Control System Large leak detected - AutoCodes.com
P1443 Mazda Code - Evaporative Emission Control System Large leak detected

What are the Possible Causes of the DTC P1443 Mazda?

  • Gas cap loose or missing
  • Faulty FTP Sensor
  • FTP Sensor harness is open or shorted
  • FTP Sensor circuit poor electrical connection

How to Fix the DTC P1443 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 P1443 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.

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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 P1443 Mazda Code

What does the OBDII code P1443 mean on a Mazda?

P1443 indicates a large leak detected in the Evaporative Emission Control (EVAP) system, which is designed to prevent fuel vapors from escaping into the atmosphere.

What are the common symptoms of code P1443 in a Mazda?

Symptoms may include an illuminated check engine light, a noticeable fuel smell, and potentially reduced fuel efficiency, though the vehicle may otherwise run normally.

What causes the P1443 code to appear on a Mazda?

Common causes include a loose or damaged gas cap, cracked or leaking EVAP hoses, a faulty purge valve, or a malfunctioning EVAP canister.

Can a loose gas cap trigger the P1443 code in a Mazda?

Yes, a loose, missing, or damaged gas cap is one of the most common causes of this code and should be checked first.

How can I fix the P1443 code on a Mazda?

Start by tightening or replacing the gas cap. If the code persists, inspect EVAP system components such as hoses, the purge valve, and the canister for leaks or damage.

Is it safe to drive with the P1443 code on a Mazda?

Yes, it is usually safe to drive, but the issue should be addressed promptly to avoid increased emissions and potential damage to the EVAP system.

How do I diagnose the P1443 code in a Mazda?

Use an OBDII scanner to confirm the code, then visually inspect the gas cap and EVAP system components. A smoke test may help identify leaks in the system.

What tools are needed to repair the P1443 code on a Mazda?

Common tools include an OBDII scanner, a smoke machine (optional for leak detection), basic hand tools, and replacement parts such as a gas cap or EVAP components.

How much does it cost to fix the P1443 code on a Mazda?

Costs vary depending on the issue. A replacement gas cap may cost under $20, while repairs involving the purge valve, canister, or hoses could range from $100 to $300 or more.

Can extreme weather cause the P1443 code in a Mazda?

Yes, extreme heat or cold can sometimes cause EVAP system components to crack, warp, or fail, leading to a large leak and triggering the P1443 code.

Discuss the causes and fixes for P1443 Mazda OBDII Code

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