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2022 Pacifica Hybrid: Reduced EV Range & Engine Not Engaging Properly

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David L. · rep 0 · May 25, 4:21 AM · 1 replies · solved · Question

Vehicle: 2022 Chrysler Pacifica Hybrid Limited

Hey everyone,

I'm looking for some insight on my 2022 Chrysler Pacifica Hybrid Limited. Lately, I've noticed a significant drop in my electric-only driving range. It used to consistently get around 30-32 miles on a full charge, but now I'm lucky to hit 20-22 miles, even with careful driving.

Another concerning issue is that the gasoline engine sometimes doesn't engage when it should. For example, when the battery is depleted, or I demand more power, there's a noticeable delay, or it feels hesitant to kick in. Occasionally, I've even seen a 'Service Hybrid System' message pop up briefly, but it usually goes away. The car has about 35,000 miles.

Is this a known issue for the Pacifica Hybrid? What should I be looking at? I'm worried about the hybrid battery or the system itself.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:21 AM

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ClearTheCode admin answer:

Reduced EV range and issues with the gasoline engine engaging in your 2022 Chrysler Pacifica Hybrid are concerning symptoms that point to potential problems within the complex hybrid system. The 'Service Hybrid System' message, even if brief, confirms that the vehicle's onboard diagnostics have detected an anomaly.

Here are the likely causes and recommended actions:

  1. High Voltage Battery Degradation or Imbalance:

    • Cause: While 35,000 miles is relatively low for significant battery degradation, an imbalance between battery cells or a fault in a specific battery module can reduce overall usable capacity and range.
    • Action: A dealership can perform a specialized diagnostic scan of the high-voltage battery system to check cell voltages, temperatures, and overall health. They can also check for any internal battery fault codes.

  2. Hybrid System Software Glitches/Updates:

    • Cause: The sophisticated hybrid system relies heavily on software to manage power flow between the battery, electric motors, and gasoline engine. Bugs or outdated software can lead to inefficient operation, reduced range, and engagement issues.
    • Action: As with many modern vehicles, a visit to the dealership to check for and apply any available software updates for the Hybrid Control Processor (HCP) and Powertrain Control Module (PCM) is crucial. These updates often address known operational quirks.

  3. Auxiliary 12V Battery Issues:

    • Cause: The 12V battery, often overlooked in hybrids, powers the vehicle's computers and relays that control the high-voltage system. A weak or failing 12V battery can cause a myriad of seemingly unrelated issues, including hybrid system malfunctions and error messages.
    • Action: Have the 12V battery tested. If it's weak, replacing it can sometimes resolve mysterious hybrid system warnings.

  4. Inverter/Converter or Electric Motor Issues:

    • Cause: Faults in the power inverter/converter (which manages power between the high-voltage battery and electric motors) or issues with the electric drive motors themselves can impact EV range and engine engagement.
    • Action: These are complex components requiring specialized diagnostic equipment and expertise. A dealership will need to perform in-depth diagnostics to identify any failures within these systems.

When to see a shop:

  • Immediately, especially since you're seeing a 'Service Hybrid System' message. This indicates a detected fault that needs professional attention.
  • If the reduced range persists or worsens.
  • If the engine engagement issues become more frequent or lead to a loss of power while driving.
  • Hybrid systems are highly specialized; it's strongly recommended to have a certified Chrysler technician diagnose and repair these issues.
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