← View Generic P0173 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2019 Ford F150 PICKUP

P0173: P0173: Fuel Trim Malfunction (Bank 1)

on 2019 Ford F150 PICKUP

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2019 Ford
F150 PICKUP
⚠️

Important for 2019 Ford F150 PICKUP Owners

Before starting repairs, verify which engine your 2019 Ford F150 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0173 Mean on 2019 Ford F150 PICKUP?

The engine computer has detected a fuel trim malfunction on bank 1, indicating a lean condition. This can be caused by a variety of issues, including a vacuum leak, faulty oxygen sensor, or clogged fuel filter.
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Symptoms

  • • Rough idle
  • • decreased power
  • • poor fuel economy
  • • and a check engine light
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Common Causes

  • • Vacuum leak
  • • faulty oxygen sensor
  • • clogged fuel filter
  • • dirty or clogged fuel injectors
  • • faulty fuel pressure regulator
  • • or a malfunctioning fuel pump
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How to Fix P0173 on 2019 Ford F150 PICKUP

1. Check for vacuum leaks and repair as necessary. 2. Replace the oxygen sensor if faulty. 3. Clean or replace the fuel filter. 4. Check and clean fuel injectors. 5. Check fuel pressure and replace the fuel pressure regulator if necessary. 6. Check the fuel pump and replace if necessary.

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Need Maintenance Info for Your F150 PICKUP?

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Parts for 2019 Ford F150 PICKUP

oxygen sensor Shop ↗ fuel filter Shop ↗ fuel injectors Shop ↗ fuel pressure regulator Shop ↗ fuel pump Shop ↗

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Related Diagnostic Codes

Other codes that may appear with P0173

P0171 Sequential Code

System Too Lean Bank 1

Medium
P0172 Sequential Code

System Too Rich Bank 1

Medium
P0174 Sequential Code

System Too Lean Bank 2

Medium
P0175 Sequential Code

System Too Rich Bank 2

Medium

💡 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