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eTorque Battery Failure on 2020 Ram 1500 - P0A94 Code

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Ryan M. · rep 0 · May 22, 3:38 AM · 1 replies · solved · Question

Vehicle: 2020 Ram 1500 Laramie

Hey everyone,

My 2020 Ram 1500 Laramie with the 5.7L Hemi eTorque system just threw a check engine light. I scanned it and got a P0A94 code, which points to an inverter performance issue or the 48V battery.

The truck has been acting a bit weird lately, with some occasional hesitation and the auto start/stop not always engaging. Now with this code, I'm worried about a major repair. Is this a common problem with the eTorque system? What kind of costs am I looking at if it's out of warranty?

Any advice or shared experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:38 AM

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ClearTheCode admin answer:

  1. Understanding the P0A94 Code: This diagnostic trouble code (DTC) specifically indicates an issue with the DC/DC converter performance circuit, which is a critical component of the Ram's 48V eTorque mild-hybrid system. It often points to a problem with the 48V battery pack itself or the power inverter module.

  2. Common Causes:

    • 48V Battery Degradation/Failure: The most frequent cause. The lithium-ion battery can degrade over time, leading to insufficient power delivery or charging issues.
    • Inverter/Converter Module Malfunction: The module responsible for converting power between the 12V and 48V systems can fail.
    • Wiring/Connection Issues: Less common, but faulty wiring or loose connections within the eTorque system can trigger the code.

  3. When to See a Shop:

    • Immediately: If your check engine light is on and you're experiencing noticeable performance issues like hesitation, reduced power, or the auto start/stop system not working, it's crucial to have it diagnosed promptly.
    • Dealer Visit Recommended: Due to the complexity and high voltage components of the eTorque system, a Ram dealership or a specialized hybrid repair shop is highly recommended. They have the specific diagnostic tools and safety protocols required.

  4. Warranty and Costs:

    • Warranty: The 48V eTorque battery and associated components are often covered under a separate, longer warranty (e.g., 8 years/100,000 miles) due to their nature as emissions-related parts. Check your specific vehicle's warranty booklet. For a 2020 model, it's very likely still under this extended warranty.
    • Out-of-Warranty Costs: If it were out of warranty, replacement of the 48V battery pack can be significant, potentially ranging from $2,000 to $4,000 or more, including labor. The inverter module can also be costly.
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