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P0505 2001 Toyota Echo Code - Idle Control System Malfunction

- Code Popularity: 7,699 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0505 2001 Toyota Echo?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Idle Air Control (IAC) Valve is stuck or closed
  • Faulty Idle Air Control Valve
  • Idle Air Control Valve harness is open or shorted
  • Idle Air Control Valve circuit poor electrical connection
  • Air Induction System (Intake leak)
  • PCV hose connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P0505 2001 Toyota Echo?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P0505 2001 Toyota Echo Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0505 2001 Toyota Echo code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine hard to start
  • Rough or erratic idle speed

Code P0505 2001 Toyota Echo Description

The rotary solenoid type Idle Air Control (IAC) valve is located on the throttle body and intake air bypassing the throttle valve is directed to the IAC valve through a passage. In this way the intake air volume bypassing the throttle valve is regulated, controlling the engine speed. The Engine Control Module (ECM) operates only the IAC valve to perform idle-up and provide feedback for the target idling speed.
The ECM regulates the idle speed by opening and closing the throttle valve using the ETCS. The ECM concludes that the idle speed control ECM function is malfunctioning and set the Diagnostic Trouble Code (DTC) if:
1. The actual idle RPM varies more than the specified amount five times or more during a drive cycle
2. The learning value of the idle speed control remains at the maximum or minimum five times or more during a drive cycle.

Example: If the actual idle RPM varies from the target idle RPM by more than 200* rpm five times during a drive cycle, the ECM will turn on the MIL and will set a DTC.

OBDII Code P0505 2001 Toyota Echo - Idle Control System Malfunction - AutoCodes.com
P0505 2001 Toyota Echo Code - Idle Control System Malfunction

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Code P0505 2001 Toyota Echo comments

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