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2021 Ram 1500 eTorque Battery Warning Light - What's Going On?

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Mike T. · rep 0 · May 25, 4:19 AM · 1 replies · solved · Question

Vehicle: 2021 Ram 1500 Laramie

Hey everyone, I'm getting a 'Service eTorque System' message on my 2021 Ram 1500 Laramie, along with the check engine light. It popped up last week and hasn't gone away. The truck seems to be driving fine, but I'm worried about potential damage or being stranded.

I scanned it with a basic OBD reader and got a P0562 code, which points to a low system voltage. Is this a common issue with the eTorque system? I've only had the truck for a couple of years and it's got about 45,000 miles on it.

What should I be looking for? Is this a known reliability problem with these trucks? I'm trying to figure out if it's something I can check myself or if it's an immediate trip to the dealership, which I'd prefer to avoid if possible due to costs.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:19 AM

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ClearTheCode admin answer:

The 'Service eTorque System' message combined with a P0562 (System Voltage Low) or P0563 (System Voltage High) code on your 2021 Ram 1500 Laramie often points to an issue within the 48-volt mild-hybrid eTorque system, specifically with the battery or its related components.

Here's what's typically involved:

  1. Understand the eTorque System: Your truck uses a 48-volt battery and a motor-generator unit to assist the engine, improve fuel economy, and provide smoother start/stop operation. The P0562 code indicates the system is detecting a voltage lower than expected.
  2. Common Causes: The most frequent culprits for this warning are:
    • 48-volt Battery Degradation: Like any battery, the eTorque battery can degrade over time, leading to insufficient voltage. This is a common wear item.
    • Software Glitch: Sometimes, a simple software update or reset can resolve erroneous warnings.
    • Wiring/Connection Issues: Loose or corroded connections within the 48-volt system can cause voltage drops.
    • DC-DC Converter Failure: This component converts the 48-volt power to 12-volt power for the rest of the vehicle's electrical system.
  3. When to See a Shop: While the truck might seem to drive normally, a persistent eTorque system warning should be addressed promptly. Continuing to drive with a fault could potentially lead to:
    • Reduced fuel efficiency.
    • Loss of the start/stop function.
    • In rare cases, more significant electrical issues.
    • Diagnosis: A dealership or a specialized independent shop with proper diagnostic tools can accurately pinpoint the exact failure. They can read manufacturer-specific codes and perform battery health tests that generic OBD scanners cannot. It's crucial to check for any relevant Technical Service Bulletins (TSBs) or recalls related to the eTorque system for your specific model year, as Dodge has issued updates for these systems.

Given the complexity of the 48-volt system, professional diagnosis is highly recommended to prevent further issues and ensure proper repair.

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