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P1104

P1104: Fuel Pressure Regulator Control Circuit Low Input

Fix Cost
$100 - $300
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Powertrain
System

📖 What Does P1104 Mean?

The fuel pressure regulator control circuit low input is detected, indicating a problem with the fuel pressure regulator or its associated wiring. (Toyota)
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Symptoms

  • Rough idle
  • decreased power
  • poor fuel economy
  • engine stalling
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Common Causes

  • Faulty fuel pressure regulator
  • clogged fuel filter
  • low fuel pressure
  • wiring issues
Fix Guide
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Possible Solutions

1. Check fuel pressure regulator for blockages or damage. 2. Replace fuel filter if clogged. 3. Inspect wiring for damage or corrosion. 4. Test fuel pressure to ensure it's within specifications.

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Common Questions About P1104

Q

Can I drive with code P1104?

A

You can drive for a short time, but should address code P1104 soon to avoid worsening the problem or failing an emissions test.

Q

How much does it cost to fix P1104?

A

The estimated repair cost for code P1104 is between $100 and $300. This includes parts and labor for most makes and models.

Q

Is this code easy to fix myself?

A

This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.

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Need a Pro?

Complex codes like P1104 can be tricky. Don't risk it if you're unsure.

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Related Diagnostic Codes

Other codes that may appear with P1104

💡 Why These Codes Are Related:

  • Similar Issues: Same root cause or component failure
  • Related Problems: Often occur together due to system interactions
  • Sequential Codes: Progressive failure stages or multiple sensors
  • Same System: Components within the same automotive system