2007 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE

Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0505) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the intelligent tester ON.
    4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
    5. Read the DTCs.

      Result 

      DTC CHART

      Display (DTC output) Proceed to
      P0505 A
      P0505 and other DTCs B

      HINT:

      If any other codes besides P0505 are output, perform troubleshooting for those DTCs first.

    B: Go to DTC CHART 

    A: Go to Next Step 

  2. CHECK CONNECTION OF PCV HOSE 

    OK: PCV hose is connected correctly and has no damage. 

    NG: REPAIR OR REPLACE PCV HOSE 

    OK: Go to Next Step 

  3. CHECK AIR INDUCTION SYSTEM 
    1. Check for vacuum leaks in the air induction system.

      OK: No leakage in the air induction system. 

    NG: REPAIR OR REPLACE AIR INDUCTION SYSTEM 

    OK: CHECK ELECTRIC THROTTLE CONTROL SYSTEM 

Factory Service Tools

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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.

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