AutoCodes – Lexus – P0511 Lexus

P0511 Lexus Code - Idle Control System Malfunction

Quick Answer

The idle speed is controlled by the Electronic Throttle Control System (ETCS). Common causes include Electronic Throttle Control System (ETCS), Air induction system, PCV hose connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0511 Lexus indicates Idle Control System Malfunction.
Common causes: Common causes include Electronic Throttle Control System (ETCS), Air induction system, PCV hose connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,681

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0511 Lexus Description

The idle speed is controlled by the Electronic Throttle Control System (ETCS). The ETCS is composed of the throttle motor, which operates the throttle valve, and the throttle position sensor, which detects the opening angle of the throttle valve. The Engine Control Module (ECM) controls the throttle motor to provide the proper throttle valve opening angle to obtain the target idle speed.

OBDII Code P0511 Lexus - Idle Control System Malfunction - AutoCodes.com — P0511 Lexus Code - Idle Control System Malfunction

What does this mean?

What are the Possible Causes of the DTC P0511 Lexus?

Electronic Throttle Control System (ETCS).
Air induction system
PCV hose connection

How to Fix the DTC P0511 Lexus?

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

What does this mean?

Code Tech Notes

Before replacing any parts, try adjust engine idle first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0511 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0511 Lexus code?

Need more information on how to fix the P0511 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0511 Lexus code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.