← View Generic P1390 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

P1390: P1390: Fuel Pressure Regulator Control Circuit Low Input

on 2018 BMW X5

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2018 BMW
X5
⚠️

Important for 2018 BMW X5 Owners

Before starting repairs, verify which engine your 2018 BMW X5 has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P1390 Mean on 2018 BMW X5?

The fuel pressure regulator control circuit low input is a manufacturer-specific code that indicates a problem with the fuel pressure regulator control circuit. This code is specific to Ford vehicles. It means that the fuel pressure regulator is not receiving the correct input signal from the engine control module, which can cause issues with fuel pressure and engine performance.
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Symptoms

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

  • • Faulty fuel pressure regulator
  • • faulty fuel pressure regulator control circuit
  • • clogged fuel filter
  • • faulty engine control module
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How to Fix P1390 on 2018 BMW X5

1. Check the fuel pressure regulator for proper operation and clean or replace it if necessary. 2. Check the fuel pressure regulator control circuit for any signs of damage or corrosion and repair or replace it if necessary. 3. Check the fuel filter for any blockages or debris and clean or replace it if necessary. 4. Check the engine control module for any faults or errors and reprogram it if necessary.

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Need Maintenance Info for Your X5?

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Parts for 2018 BMW X5

Fuel pressure regulator Shop ↗ Fuel pressure regulator control circuit Shop ↗ Fuel filter Shop ↗

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P1390

P1388 Sequential Code

P1388: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1389 Sequential Code

P1389: Fuel Pressure Regulator Control Circuit Low

Medium
P1391 Sequential Code

P1391: Fuel Pressure Regulator Control Circuit Low Input

Medium
P1392 Sequential Code

P1392: 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