Stihl Trimmer Error Code 2 Flash: How to Fix It

Medium 45-90 minutes Medium Severity Verified June 2026
Error Code
2 Flash
Brand
Stihl
Product Type
trimmer
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
45-90 minutes
Stihl trimmer error code 2 flash (also called 2 blink) indicates a throttle position sensor (TPS) abnormality. This error prevents proper engine operation and throttle response. The issue is typically caused by a faulty throttle position sensor, damaged wiring, or throttle body contamination.
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Tools You'll Need

How to Fix Error Code 2 Flash

  1. Turn Off and Cool Down Trimmer

    Always ensure the engine is cool before performing any maintenance to avoid burns.
  2. Check Throttle Trigger Operation

  3. Inspect Throttle Position Sensor Connections

    Disconnect the battery or ignition system before working on electrical connections.
  4. Test Throttle Position Sensor Resistance

  5. Clean Throttle Body and Sensor

    Use only approved cleaners and avoid forcing cleaning solutions into electrical components.
  6. Check Throttle Cable and Linkage

  7. Replace Throttle Position Sensor

    Handle the new sensor carefully and avoid touching the sensing elements.
  8. Clear Error Code and Test

    Ensure all tools and loose items are clear of the trimmer before starting.

Parts You May Need

Throttle position sensor
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Electrical contact cleaner
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Carburetor cleaner
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Throttle position sensor
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Electrical contact cleaner
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Carburetor cleaner
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Throttle position sensor
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Electrical contact cleaner
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Carburetor cleaner
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Throttle position sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Carburetor cleaner
Check Price on Amazon
Throttle position sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Carburetor cleaner
Check Price on Amazon
Throttle position sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Carburetor cleaner
Check Price on Amazon
Throttle position sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Carburetor cleaner
Check Price on Amazon
Throttle position sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Carburetor cleaner
Check Price on Amazon
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When to Call a Professional

Call a professional if you're uncomfortable working with electrical components, if multiple error codes appear simultaneously, or if the error persists after replacing the throttle position sensor. Also seek professional help if you notice internal engine damage or if the trimmer requires carburetor rebuilding.

Frequently Asked Questions

What does Stihl trimmer error code 2 flash mean?
Stihl trimmer error code 2 flash (or 2 blink) indicates a throttle position sensor abnormality. This means the engine control system cannot properly read the throttle position, affecting engine performance and throttle response.
Can I still use my Stihl trimmer with error code 2 flash?
You should not continue using your Stihl trimmer with error code 2 flash as it can cause poor engine performance, stalling, and potential damage to other engine components. Address the throttle position sensor issue before continued use.
How much does it cost to fix Stihl trimmer error code 2 flash?
Fixing Stihl trimmer error code 2 flash typically costs $25-75 if you do it yourself (mainly for a replacement throttle position sensor). Professional repair costs range from $80-150 including parts and labor.
How do I reset Stihl trimmer error codes?
Stihl trimmer error codes like 2 flash typically clear automatically once the underlying problem is fixed. There's no manual reset procedure - simply repair the throttle position sensor issue and start the trimmer to see if the code clears.
What causes Stihl trimmer throttle position sensor problems?
Stihl trimmer throttle position sensor problems are commonly caused by dirt and debris buildup, corrosion on electrical connections, sensor wear from normal use, or damage from vibration. Regular cleaning and maintenance can help prevent these issues.