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HOMESERVICE MANUALSTOYOTA2003PRIUSREPAIR AND DIAGNOSISTRANSMISSIONTRANSMISSION CONTROL SYSTEMSTRANSMISSION CONTROL SYSTEM TRANSAXLE CONTROL SYSTEMPROBLEM SYMPTOMS TABLE
2003 Toyota Prius

Problem Symptoms Table

2003 Toyota PriusSECTION Problem Symptoms Table

Use the table below to find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.

PROBLEM SYMPTOMS

Symptom Suspect Area Action
Noise
  1. 1. Oil (Level low)
  2. 2. Oil (Wrong)
  3. 3. Gear (Worn or damaged)
  4. 4. Bearing (Worn or damaged)
  1. ON-VEHICLE REPAIR 
  2. ON-VEHICLE REPAIR 
  3. COMPONENTS 
  4. COMPONENTS 
Oil leakage
  1. Oil (Level too high)
  2. Gasket (Damaged)
  3. Oil seal (Worn or damaged)
  4. O-Ring (Worn or damaged)
  1. ON-VEHICLE REPAIR 
  2. COMPONENTS 
  3. ON-VEHICLE REPAIR  ; REPLACEMENT  ; COMPONENTS 
  4. ON-VEHICLE REPAIR  ; COMPONENTS 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.