← View Generic P0078 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0078: P0078: Fuel Pressure Regulator Control Circuit Low

on 2021 Honda PASSPORT

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0078 Mean on 2021 Honda PASSPORT?

The fuel pressure regulator control circuit is malfunctioning, causing the fuel pressure to be lower than expected. This can lead to poor engine performance, decreased fuel efficiency, and potentially cause the engine to stall.
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Symptoms

  • • Poor engine performance
  • • decreased fuel efficiency
  • • engine stalling
  • • rough idling
  • • decreased power
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Common Causes

  • • Faulty fuel pressure regulator
  • • clogged fuel filter
  • • faulty fuel pump
  • • vacuum leaks
  • • faulty fuel pressure sensor
🛠️

How to Fix P0078 on 2021 Honda PASSPORT

1. Check and clean the fuel filter. 2. Check for vacuum leaks. 3. Check the fuel pressure regulator for proper operation. 4. Replace the fuel pressure regulator if faulty. 5. Check the fuel pump for proper operation.

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Need Maintenance Info for Your PASSPORT?

Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.

View 2021 Honda PASSPORT Specs

Parts for 2021 Honda PASSPORT

Fuel pressure regulator Shop ↗ Fuel filter Shop ↗ Fuel pump Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

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Related Diagnostic Codes

Other codes that may appear with P0078

P0076 Sequential Code

P0076: Fuel Pressure Regulator Control Circuit Low

Medium
P0077 Sequential Code

P0077: Fuel Pressure Regulator Control Circuit Low Input

Medium
P0079 Sequential Code

P0079: Fuel Pressure Regulator Control Circuit Low

Medium
P0080 Sequential Code

P0080: Fuel Pressure Regulator Circuit Malfunction

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