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What to do if…
your plug-in hybrid has a fault mode or reduced power warning

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

Keep the vehicle secured where it is, check for urgent hazards, and do not re-enter traffic while power is reduced. If the warning remains or returns, call roadside assistance or a tow and say it is a plug-in hybrid with reduced power.

Do not do these things

  • Do not merge back into traffic to “see if it is fine now.”
  • Do not repeatedly restart or drive-test the car if the fault or reduced-power warning stays on.
  • Do not keep driving if you cannot maintain a safe speed for traffic, or if any “stop safely,” overheating, smoke, fire, or battery warning appears.
  • Do not touch orange high-voltage cables, connectors, or covers marked for high voltage.
  • Do not open panels, remove covers, crawl under the vehicle, or attempt roadside repairs near moving traffic.
  • Do not charge the vehicle again until the warning has been checked or the vehicle’s display, manual, or repair professional says it is safe.

What to do now

  1. Secure the stopped vehicle. Shift to Park, set the parking brake, and turn on hazard lights if you are on or near traffic, on a shoulder, or creating any obstruction.

  2. Choose the safer place to wait.

    • If you are well out of traffic, it is often safer to stay buckled inside with hazards on.
    • If you are in an active lane, on a narrow shoulder, in low visibility, or feel the vehicle may be struck, get behind a barrier only if you can do that without crossing dangerous traffic.
    • If you cannot get to a safer position, call 911 and explain that a disabled plug-in hybrid is stopped in or near traffic.

  3. Check for urgent hybrid hazards. If you notice smoke, flames, a burning smell, unusual heat, hissing, leaking fluid, eye or throat irritation, or an urgent “stop safely” or overheating message, move people away from the vehicle if you can do so safely and call 911.

  4. Do one controlled restart only if it is safe. If there are no urgent hazards and the display or owner’s manual does not tell you not to, turn the vehicle fully off, wait briefly, restart once, and check the warning. If reduced power remains or returns, treat the vehicle as not safe to drive in traffic.

  5. Call roadside assistance or a tow. Use your auto club, insurer, manufacturer roadside service, or another roadside provider. Tell them: “This is a plug-in hybrid. It has a reduced-power or fail-safe warning and may need manufacturer towing or recovery guidance.”

  6. Do not handle high-voltage parts while waiting. High-voltage wiring is commonly color-coded, often orange. Keep hands and tools away from high-voltage cables, connectors, battery areas, and any damaged underbody area.

  7. Give clear information when help arrives. Tell the operator or tow provider it is a plug-in hybrid, show the dashboard warning if you can do so safely, and ask them to follow the vehicle’s manufacturer towing or recovery instructions.

What can wait

  • You do not need to diagnose the fault, clear codes, or decide on repairs right now.
  • You do not need to decide whether the car can use gas mode, electric mode, or charging later today.
  • You do not need to prove the vehicle can drive normally before help arrives.
  • You do not need to report a safety problem until you and the vehicle are no longer in the roadside situation.

Important reassurance

Reduced-power and fail-safe modes are often intended to limit further damage or unsafe operation. Pulling over and pausing was the right first move; the next safe step is to avoid testing the car in traffic and let roadside or repair professionals take over.

Scope note

These are first steps only to stabilize the roadside situation and prevent avoidable harm. Later decisions about towing method, charging, repair, warranty, recalls, or safety reporting may need the vehicle manual, the manufacturer, a qualified repair shop, or another specialist.

Important note

This is general information, not mechanical, legal, medical, financial, therapeutic, or other professional advice. If you feel unsafe where you are, are stopped in or near traffic, or notice smoke, fire, overheating, fumes, or injury, call emergency services.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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