PanicStation.org
UK USA
us Transport & mobility emergencies plug-in hybrid fault mode • phev power reduced • reduced engine power message • limp mode after pulling over • hybrid system warning • ev power limited warning • car won’t accelerate properly • dashboard fault after stopping • roadside breakdown safety • shoulder stopped safely • call roadside assistance • when to call 911 • restart didn’t clear warning • high voltage cable safety • orange cables hybrid • waiting for a tow • avoid roadside repairs • safe location already • protect battery and drivetrain

What to do if…
your plug-in hybrid enters a fault mode and power is reduced after you have pulled over safely

Short answer

Secure the scene (Park, lights as needed), and assume you need roadside assistance/tow unless the warning clears and you can drive normally and safely.

Do not do these things

  • Don’t merge back into traffic to “see if it’s fine now.”
  • Don’t repeatedly restart or drive-test the car if the warning stays on after one restart.
  • Don’t continue driving if you can’t maintain a safe speed for traffic, or if any “stop now/overheat” warning appears.
  • Don’t touch orange (high-voltage) cables, connectors, or covers marked for high voltage.
  • Don’t attempt roadside repairs in fast-moving traffic or in an unsafe area.

What to do now

  1. Secure the vehicle. Shift to Park, set the parking brake, and turn on hazard lights if you’re on/near traffic or creating any obstruction. Stay seat-belted if you’re close to traffic.
  2. Make a quick safety call: stay inside vs. get out.
    • On busy/high-speed roads, it’s often safer to stay buckled inside with hazards on unless there’s immediate danger (smoke/fire) or you’re stopped in an active lane and can safely get behind a barrier.
    • If you are in a dangerous spot (narrow shoulder, low visibility, heavy/high-speed traffic) and you cannot get to a safer position, call 911.
  3. Scan for “stop now” hazards. If you notice smoke, burning smell, unusual heat, hissing, or urgent warnings (overheating / “stop safely”), move people away from the vehicle and call 911.
  4. Try one controlled restart (once). If there are no urgent warnings, turn the vehicle fully off, wait briefly, restart, and check whether the reduced-power/fault mode remains. If it stays on or returns, treat the vehicle as not safe to drive.
  5. Call for roadside assistance or a tow. Use your auto club/insurance/roadside provider. Tell them: “plug-in hybrid, reduced power / fail-safe mode,” and ask if they need a flatbed per the manufacturer’s guidance.
  6. Avoid high-voltage contact while waiting. High-voltage wiring is commonly marked/color-coded (often orange). Don’t open or remove panels/covers to “look for the problem,” and keep bystanders away if there’s any sign of underbody damage.
  7. Once help arrives, protect responders and yourself. Tell the operator it’s a plug-in hybrid and point out any warning messages on the dash. Follow their instructions and keep clear during loading.

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 to continue charging or using electric mode today—follow any on-screen instructions and the advice from the tow/repair shop.
  • You do not need to force the vehicle to drive “normally” before you’re in a safe place.

Important reassurance

Reduced-power (“limp”) modes are built to protect the vehicle and occupants. The safest approach is to stop safely (which you’ve done) and hand off to professionals rather than pushing your luck in traffic.

Scope note

This is first steps only to stabilize the situation and prevent harm. Next steps depend on the exact vehicle message and a professional diagnosis.

Important note

This is general information, not mechanical or legal advice. If you feel unsafe where you are or there’s any sign of fire/overheating, call emergency services.

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