Mazda Error Code P1195: How to Fix It
Medium 1-2 hours Medium Severity
Verified June 2026
- Error Code
- P1195
- Brand
- Mazda
- Product Type
- automotive
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 1-2 hours
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Tools You'll Need
- OBD2 scanner
- Multimeter
- Basic hand tools
- Vacuum pump (optional)
- Safety glasses
How to Fix Error Code P1195
-
Connect OBD2 Scanner and Confirm Code
Ensure the engine is completely cool before beginning any diagnostic work. -
Visually Inspect EGR System Components
Engine may be hot - allow sufficient cooling time and avoid touching hot surfaces. -
Test EGR Boost Sensor Electrical Connection
-
Check Vacuum Lines and EGR Valve Operation
-
Test EGR Boost Sensor Function
Keep hands and tools clear of moving engine parts while testing. -
Replace Faulty Components
Always disconnect the battery before replacing electrical components to prevent shorts or damage. -
Clear Codes and Test Drive
Parts You May Need
EGR boost sensor
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Vacuum hoses
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EGR valve
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Electrical connector
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EGR boost sensor
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Vacuum hoses
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EGR valve
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Electrical connector
Check Price on Amazon
EGR boost sensor
Check Price on Amazon
Vacuum hoses
Check Price on Amazon
EGR valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EGR boost sensor
Check Price on Amazon
Vacuum hoses
Check Price on Amazon
EGR valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EGR boost sensor
Check Price on Amazon
Vacuum hoses
Check Price on Amazon
EGR valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
EGR boost sensor
Check Price on Amazon
Vacuum hoses
Check Price on Amazon
EGR valve
Check Price on Amazon
Electrical connector
Check Price on Amazon
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When to Call a Professional
Call a professional mechanic if you're uncomfortable working with electrical systems, if multiple related codes appear simultaneously, or if the problem persists after replacing obvious faulty components. Complex EGR system issues may require specialized diagnostic equipment and technical knowledge.Frequently Asked Questions
Can I drive my Mazda with P1195 error code?
You can drive short distances, but the vehicle may experience reduced performance, poor fuel economy, and increased emissions. It's best to diagnose and fix the issue promptly to prevent potential damage to other engine components.
How much does it cost to fix Mazda P1195 error code?
Repair costs typically range from $100-400 depending on the root cause. A simple vacuum hose replacement costs around $20-50, while an EGR boost sensor replacement typically costs $150-300 including parts and labor.
What causes Mazda P1195 EGR boost sensor circuit error?
Common causes include a faulty EGR boost sensor, damaged vacuum hoses, corroded electrical connections, a stuck EGR valve, or carbon buildup in the EGR system preventing proper operation.
Will P1195 error code cause my Mazda to fail emissions testing?
Yes, P1195 will likely cause your vehicle to fail emissions testing since it indicates an EGR system malfunction. The EGR system is crucial for controlling NOx emissions, and any related error codes must be resolved before passing inspection.
How do I prevent P1195 error code from returning?
Regular maintenance including cleaning the EGR system, replacing vacuum hoses when cracked, and using quality fuel with occasional injector cleaner can help prevent EGR-related issues. Follow your Mazda's recommended maintenance schedule for best results.