← View Generic P0704 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

P0704: P0704: Transmission Control System Malfunction

on 2018 BMW X5

Fix Cost
$200 - $1000
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 P0704 Mean on 2018 BMW X5?

The P0704 code indicates a malfunction in the transmission control system, which can cause issues with gear shifting and transmission operation.
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Symptoms

  • • Shifting problems
  • • hesitation
  • • slipping
  • • or complete loss of transmission function
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Common Causes

  • • Faulty transmission control module
  • • faulty transmission solenoids
  • • wiring issues
  • • or faulty transmission sensors
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How to Fix P0704 on 2018 BMW X5

1. Check and clear any trouble codes. 2. Inspect and clean the transmission solenoids. 3. Replace faulty transmission solenoids. 4. Check and repair any wiring issues. 5. Replace faulty transmission sensors. 6. Update the transmission control module software.

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Parts for 2018 BMW X5

Transmission control module Shop ↗ Transmission solenoids Shop ↗ Wiring harness Shop ↗ Transmission sensors Shop ↗

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Related Diagnostic Codes

Other codes that may appear with P0704

P0700 Same System

Transmission Control System Malfunction

High
P0701 Same System

P0701: Transmission Control System Malfunction

Medium
P0702 Same System

P0702: Transmission Control System Malfunction

Medium
P0703 Same System

P0703: Transmission Control System Malfunction

Medium
P0705 Same System

P0705: Transmission Control System 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