U0412, P0620 error code - Your car alternator and battery may not be the real problem, watch this
In this in-depth video, we break down exactly what you need to do if your car makes a clicking sound, the lights flicker or go off, and it won’t start. Common symptoms like a drained battery, weak cranking sound, engine stalling, or even error codes P0620 and U0412 can be frustrating, but we’ve got you covered!
Before you rush to replace your car’s battery or alternator, watch this video! We’ll teach you how to diagnose these issues properly, and you’ll learn how to run a quick and easy test to check if your car battery is truly dead. Many people end up spending money on new batteries or alternators that don’t fix the problem. Avoid this mistake by following our expert advice!
We’ll cover topics such as:
- The common causes behind battery drainage, including weather-related issues and faulty alternators.
- How the P0620 error code points to a generator (alternator) control circuit malfunction and can be the trigger for further errors like U0412.
- Why faulty charge controllers and battery issues often go undetected.
- Detailed methods for inspecting your car’s generator control circuit, battery, and wiring for signs of damage.
**What You’ll Learn in This Video:**
- How to test if your battery is truly dead using a simple boiling test.
- The role of weather and moisture in battery corrosion and electrical malfunctions.
- How to properly diagnose a faulty alternator, voltage regulator, or charge controller.
- Wiring issues that can lead to high resistance in the generator circuit and trigger the P0620 error code.
- What to do if you suspect your PCM (Powertrain Control Module) or fuses are behind the problem.
Don’t waste your time and money on unnecessary repairs. Follow our step-by-step guide, and by the end of this video, you’ll know how to fix your car’s starting issues, prevent them from happening again, and save yourself from expensive alternator and battery replacements.
Exclusive Tips:
- Learn how to read trouble codes, reset warning lights, and perform advanced diagnostics.
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Common Questions Answered in This Video:
- What causes the P0620 error code, and how can I fix it?
- How do I check if my car battery is really dead or just not charging properly?
- What’s the proper voltage range for an alternator, and how do I know if mine is faulty?
- How can weather conditions impact my car’s electrical system?
- Should I replace the alternator or the charge controller first when my car won’t start?
This video is a must-watch for anyone experiencing car starting issues or persistent battery problems. Stay calm, watch the video till the end, and avoid costly mistakes that could leave you stranded.
00:00 – Intro: Car Won’t Start? Here’s Why!
00:50 – What is the P0620 Error Code?
01:30 – Key Causes of Dead Battery & Alternator Issues
02:20 – Testing Your Battery: Is it Really Dead?
03:10 – Alternator vs. Battery: What's the Real Issue
04:05 – How Weather Impacts Battery Performance
05:00 – Diagnosing the P0620 Error Code
06:00 – Fixing Battery Corrosion and Terminals
06:55 – Inspecting the Generator Circuit
07:40 – Fixing Charge Controller Issues
08:30 – When to Replace Your Alternator
09:20 – Clearing the P0620 Code
10:10 – Final Tips