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2020 QX60 Battery Light On and Slow Cranking - Alternator or Battery?

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Mike T. · rep 0 · May 25, 3:49 AM · 1 replies · solved · Question

Vehicle: 2020 Infiniti QX60 AWD

Hi all,

My 2020 Infiniti QX60 AWD has recently started showing the battery warning light on the dashboard. It's not on constantly, but it flickers on and off, especially at lower RPMs. I've also noticed that the engine is cranking slower than usual when I start it, particularly in the mornings.

I'm worried it might be the alternator, but I'm not sure how to tell if it's the battery or the charging system. I don't want to replace the wrong part. Has anyone had similar issues with their QX60? What was the fix?

Any insights would be super helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:49 AM

0

ClearTheCode admin answer:

The flickering battery light and slow cranking in your 2020 Infiniti QX60 are classic symptoms of a problem within the charging system. It could be the battery, the alternator, or even wiring issues.

Common Causes:

  1. Failing Alternator: The alternator is responsible for generating power to run the car's electrical systems and recharge the battery while the engine is running. If it's failing, it won't produce enough voltage, leading to the battery light and a drained battery.
  2. Weak/Dying Battery: Even if the alternator is good, an old or weak battery might not hold a charge effectively, leading to slow cranking. However, a flickering battery light usually points more towards the charging system.
  3. Loose or Corroded Battery Terminals/Cables: Poor connections can impede the flow of electricity, affecting both charging and starting.
  4. Serpentine Belt Issues: The alternator is driven by the serpentine belt. If the belt is loose, worn, or broken, the alternator won't spin correctly.

Troubleshooting Steps & OBD Codes:

  1. Check Battery Terminals: Ensure your battery terminals are clean, tight, and free of corrosion.
  2. Voltage Test: With the engine off, a healthy battery should read around 12.6 volts. With the engine running, the voltage across the battery terminals should be between 13.5 and 14.7 volts. If it's below 13.5V, the alternator is likely failing.
  3. Listen for Belt Squeal: A squealing noise could indicate a loose or failing serpentine belt.
  4. OBD Codes: A failing charging system can trigger codes such as:
    • P0562: System Voltage Low
    • P0563: System Voltage High
    • P0622: Generator Field Control Circuit Malfunction

When to See a Shop:

If you're unsure about performing voltage tests or if the problem persists, it's crucial to have your QX60 inspected by a professional mechanic immediately. Driving with a faulty charging system can lead to your car suddenly dying, potentially stranding you. A shop can perform a comprehensive battery and alternator load test to pinpoint the exact cause and ensure proper repair.

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