← View Generic P0140 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

P0140: Oxygen Sensor Circuit No Activity Bank 1 Sensor 2

on 2018 BMW X5

Fix Cost
$50 - $250
Parts & Labor
Difficulty
2/5
30 mins - 1 hour
DIY Possible?
✅ Yes
Save money
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 P0140 Mean on 2018 BMW X5?

The downstream oxygen sensor on bank 1 shows no switching activity.
⚠️

Symptoms

  • • Failed emissions test
  • • check engine light
  • • catalytic converter monitoring disabled.
🔍

Common Causes

  • • Failed oxygen sensor
  • • open wiring circuit
  • • no power to sensor
  • • completely contaminated sensor.
🛠️

How to Fix P0140 on 2018 BMW X5

Replace oxygen sensor, repair open circuits, check power supply, inspect for contamination.

🔧

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Parts for 2018 BMW X5

Oxygen Sensor Shop ↗ O2 Sensor Socket Shop ↗

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Related Diagnostic Codes

Other codes that may appear with P0140

P0138 Sequential Code

Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2

Medium
P0139 Sequential Code

Oxygen Sensor Circuit Slow Response Bank 1 Sensor 2

Medium
P0141 Sequential Code

Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 2

Medium
P0142 Sequential Code

P0142: 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