← View Generic P1238 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P1238: P1238: Fuel Pressure Regulator Control Circuit Low Input

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 P1238 Mean on 2021 Honda PASSPORT?

The fuel pressure regulator control circuit low input is a manufacturer-specific code that indicates a problem with the fuel pressure regulator's control circuit. This code is specific to Ford vehicles. It may be caused by a faulty fuel pressure regulator, a wiring issue, or a problem with the engine control module.
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Symptoms

  • • Rough engine idle
  • • decreased fuel efficiency
  • • poor engine performance
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Common Causes

  • • Faulty fuel pressure regulator
  • • wiring issue
  • • engine control module problem
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How to Fix P1238 on 2021 Honda PASSPORT

Check the fuel pressure regulator for proper operation and replace if necessary. Check the wiring harness for any damage or corrosion and repair or replace as needed. Update the engine control module software if necessary.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Fuel pressure regulator Shop ↗ Wiring harness Shop ↗

Essential Tool

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Related Diagnostic Codes

Other codes that may appear with P1238

P1236 Sequential Code

P1236: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1237 Sequential Code

P1237: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1239 Sequential Code

P1239: Ford Engine Oil Pressure Sensor Circuit Malfunction

Medium
P1240 Sequential Code

P1240: Fuel Pressure Regulator Control Circuit Low Input

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