Subaru Error Code P1230: How to Fix It

Medium 1-2 hours High Severity Verified June 2026
Error Code
P1230
Brand
Subaru
Product Type
automotive
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P1230 in your Subaru indicates a problem with the fuel pump control module circuit. This error can cause poor engine performance, stalling, or difficulty starting your vehicle. While some diagnostic steps can be done at home, this issue often requires professional attention due to the complexity of the fuel system.
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Tools You'll Need

How to Fix Error Code P1230

  1. Turn off engine and ensure safety

    Never work on fuel system components while the engine is running or hot. Fuel vapors are highly flammable.
  2. Connect OBD2 scanner and verify code

  3. Check fuel pump fuse and relay

  4. Inspect fuel pump control module connections

    Do not disconnect fuel lines. Work only with electrical connections.
  5. Test fuel pump control module voltage

    Be careful not to short circuit electrical connections with multimeter probes.
  6. Check fuel pump operation

  7. Clear codes and test drive

Parts You May Need

Fuel pump control module
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Fuel pump relay
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Automotive fuse set
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Electrical contact cleaner
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Fuel pump control module
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Fuel pump relay
Check Price on Amazon
Automotive fuse set
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Fuel pump control module
Check Price on Amazon
Fuel pump relay
Check Price on Amazon
Automotive fuse set
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Fuel pump control module
Check Price on Amazon
Fuel pump relay
Check Price on Amazon
Automotive fuse set
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Fuel pump control module
Check Price on Amazon
Fuel pump relay
Check Price on Amazon
Automotive fuse set
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Fuel pump control module
Check Price on Amazon
Fuel pump relay
Check Price on Amazon
Automotive fuse set
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
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When to Call a Professional

Call a professional mechanic if the fuel pump control module needs replacement, if you're not comfortable working with electrical systems, or if the code persists after basic troubleshooting. Fuel system repairs often require specialized tools and expertise to ensure safety and proper operation.

Frequently Asked Questions

What causes Subaru P1230 error code?
P1230 is typically caused by a faulty fuel pump control module, damaged wiring harness, corroded electrical connections, blown fuse, or a failing fuel pump relay. Less commonly, it can be caused by a faulty fuel pump itself.
Can I drive with P1230 code?
You should avoid driving with P1230 as it affects fuel delivery to your engine. This can cause stalling, poor performance, or leave you stranded. Have it diagnosed and repaired promptly to avoid being stuck on the road.
How much does it cost to fix P1230?
Repair costs vary depending on the root cause. A fuse replacement costs under $10, while a fuel pump control module replacement can cost $200-500 in parts plus labor. Professional diagnosis typically costs $100-150.
Is P1230 the same as P0230?
No, P1230 is a manufacturer-specific code for Subaru fuel pump control module issues, while P0230 is a generic OBD2 code for fuel pump primary circuit problems. They're related but indicate different specific issues.
How do I reset Subaru P1230 code?
Use an OBD2 scanner to clear the code, or disconnect the battery for 15 minutes. However, the code will return if the underlying problem isn't fixed. Always diagnose and repair the root cause before clearing codes.