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P3009 fault code: what it means

P3009: High-voltage leak detected: current is leaking from the hybrid high-voltage system to the body. A real shock and fire risk until fixed.

Engine and gearbox (powertrain) · Safety risk

Usual causes, most likely first

  1. hybrid battery modules leaking electrolyte (often after a clogged cooling fan)
  2. damaged high-voltage cable insulation
  3. water getting into the hybrid battery or HV parts

P3009 by make

Lexus

High-voltage leak detected: current is leaking from the hybrid high-voltage system to the body. A real shock and fire risk until fixed.

Usual causes: hybrid battery modules leaking electrolyte (often after a clogged cooling fan); damaged high-voltage cable insulation; water getting into the hybrid battery or HV parts

Toyota

High-voltage leak detected: current is leaking from the hybrid high-voltage system to the body. A real shock and fire risk until fixed.

Usual causes: hybrid battery modules leaking electrolyte (often after a clogged cooling fan); damaged high-voltage cable insulation; water getting into the hybrid battery or HV parts

What the repair usually costs

Not sure what P3009 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.