Subaru Error Code P1443: How to Fix It

Medium 1-2 hours Low Severity Verified June 2026
Error Code
P1443
Brand
Subaru
Product Type
automotive
Severity
Low
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Subaru error code P1443 indicates a problem with your EVAP canister purge volume control valve, which helps control fuel vapor emissions. While this is typically a low-severity issue that won't leave you stranded, it can cause your check engine light to illuminate and may affect fuel efficiency if left unaddressed.
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Tools You'll Need

How to Fix Error Code P1443

  1. Turn off engine and ensure safety

    Never work on a hot engine. Fuel vapors are present in the EVAP system and can be dangerous around heat sources.
  2. Connect OBD2 scanner and verify code

  3. Locate the EVAP canister purge valve

  4. Inspect electrical connections

    Disconnect the negative battery terminal before cleaning electrical connections.
  5. Check vacuum hoses

  6. Test the purge valve

    Use caution when applying power to automotive components. Use proper test equipment.
  7. Replace purge valve if necessary

  8. Clear codes and test drive

Parts You May Need

EVAP canister purge volume control valve
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Electrical connector
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EVAP canister purge volume control valve
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Electrical connector
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EVAP canister purge volume control valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EVAP canister purge volume control valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EVAP canister purge volume control valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EVAP canister purge volume control valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
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When to Call a Professional

Contact a qualified mechanic if you're uncomfortable working with electrical components, if the problem persists after replacing the purge valve, or if you discover additional EVAP system codes that suggest more complex issues with the charcoal canister or fuel tank pressure sensor.

Frequently Asked Questions

Can I drive with Subaru error code P1443?
Yes, P1443 is a low-severity code and won't prevent normal driving. However, you should address it promptly as it can affect fuel efficiency and emissions compliance.
How much does it cost to fix P1443 on a Subaru?
If the issue is just the purge valve, expect to pay $50-150 for parts plus 1-2 hours of labor. Total repair costs typically range from $150-350 at a shop.
What causes Subaru P1443 error code?
P1443 is usually caused by a faulty EVAP canister purge valve, damaged vacuum hoses, poor electrical connections, or rarely, issues with the engine control module.
Will P1443 cause my Subaru to fail emissions testing?
Yes, an active P1443 code will likely cause your vehicle to fail emissions testing since it relates to the evaporative emissions control system.
How do I prevent P1443 from happening again?
Regular maintenance helps prevent P1443. Replace fuel cap if damaged, avoid topping off gas tank, and have EVAP system inspected during routine services.