What is P0686 : Engine Error Code Causes Explained
In this video, we explain Engine Error Code P0686, which means there’s a low voltage issue in the ECM/PCM Power Relay Control Circuit. This error is serious—it can prevent your car from starting or running properly if ignored. 🚫🚗
🎯 In this video, you’ll learn:
✅ What P0686 means and how it impacts your vehicle’s powertrain
✅ Common causes: faulty power relay, corroded or loose wiring, blown fuse, or a failed ECM/PCM
✅ Symptoms: no start condition, intermittent stalling, check engine light, or total loss of engine power
✅ How to test the power relay, wiring harness, and PCM circuit
✅ Smart fixes: replacing the relay, checking fuses, or cleaning battery terminals
This guide is ideal for anyone experiencing sudden power loss or unexplained stalling. We’ll walk you through what to check, how to test it, and what actions to take next before heading to a mechanic. 🔧💡
👉 If this video saved you time or money, please Like, Comment with your vehicle’s behavior or questions, and Subscribe for more helpful code explanations and car repair tips. Tap the 🔔 to stay updated on future uploads!
🔖 Hashtags:
#p0686 #errorcode #pcmrelay #checkenginelight #nopower
Join this channel to get access to perks:
https://www.youtube.com/channel/UChS1dnqIPylZ2j1nRBXMa2Q/join
Видео What is P0686 : Engine Error Code Causes Explained канала Auto User Guide
🎯 In this video, you’ll learn:
✅ What P0686 means and how it impacts your vehicle’s powertrain
✅ Common causes: faulty power relay, corroded or loose wiring, blown fuse, or a failed ECM/PCM
✅ Symptoms: no start condition, intermittent stalling, check engine light, or total loss of engine power
✅ How to test the power relay, wiring harness, and PCM circuit
✅ Smart fixes: replacing the relay, checking fuses, or cleaning battery terminals
This guide is ideal for anyone experiencing sudden power loss or unexplained stalling. We’ll walk you through what to check, how to test it, and what actions to take next before heading to a mechanic. 🔧💡
👉 If this video saved you time or money, please Like, Comment with your vehicle’s behavior or questions, and Subscribe for more helpful code explanations and car repair tips. Tap the 🔔 to stay updated on future uploads!
🔖 Hashtags:
#p0686 #errorcode #pcmrelay #checkenginelight #nopower
Join this channel to get access to perks:
https://www.youtube.com/channel/UChS1dnqIPylZ2j1nRBXMa2Q/join
Видео What is P0686 : Engine Error Code Causes Explained канала Auto User Guide
auto user guide Owner's Manual Car guide p0686 engine error code ecm relay voltage drop p0686 car won't start how to fix p0686 obd2 code p0686 explained p0686 troubleshooting steps low voltage pcm power supply engine stalls p0686 ecm fuse problem pcm wiring diagram faulty ignition relay p0686 p0686 repair tips vehicle power control fault p0686 circuit testing p0686 causes and symptoms car not starting due to relay ecm relay issue engine error
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8 июля 2025 г. 17:02:27
00:01:48
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