AutoCodes – Lexus – P1603 Lexus

P1603 Lexus Code - Engine Stall History

Quick Answer

After starting the engine, this Diagnostic Trouble Code (DTC) is stored when the engine stops without the ignition switch being operated. Common causes include Air Leak in Intake System, Faulty Mass Air Flow (MAF) sensor, Faulty Engine Coolant Temperature Sensor. 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: P1603 Lexus indicates Engine Stall History.
Common causes: Common causes include Air Leak in Intake System, Faulty Mass Air Flow (MAF) sensor, Faulty Engine Coolant Temperature Sensor.
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.

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Code Popularity 20,427

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 06, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1603 Lexus Description

After starting the engine, this Diagnostic Trouble Code (DTC) is stored when the engine stops without the ignition switch being operated. With the engine running, the engine stops (the engine speed drops to 200 RPM or less) without the ignition switch being operated for 0.5 seconds or more. It is necessary to check if the vehicle has run out of fuel before performing troubleshooting, as this DTC is also stored when the engine stalls due to running out of fuel.

OBDII Code P1603 Lexus - Engine Stall History - AutoCodes.com — P1603 Lexus Code - Engine Stall History

What does this mean?

What are the Possible Causes of the DTC P1603 Lexus?

Air Leak in Intake System
Faulty Mass Air Flow (MAF) sensor
Faulty Engine Coolant Temperature Sensor
Faulty Fuel Pump
Faulty Throttle Body Assembly
Faulty Engine Control Module (ECM)

How to Fix the DTC P1603 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1603 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 P1603 Lexus code?

Need more information on how to fix the P1603 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1603 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.

Frequently Asked Questions about P1603 Lexus Code

1. What are the common symptoms of OBDII code P1603 (Lexus) related to Engine Stall History?

- Common symptoms include engine stalling, rough idling, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1603 (Lexus) indicating Engine Stall History?

- Possible causes include a faulty engine control module (ECM), issues with the throttle body, or problems with the idle air control valve.

3. How can I diagnose the OBDII code P1603 (Lexus) for Engine Stall History?

- Proper diagnosis involves using an OBDII scanner to read the code, checking for any other related codes, and performing a visual inspection of the engine components.

4. What are some repair tips for addressing OBDII code P1603 (Lexus) associated with Engine Stall History?

- Repair tips may include checking and cleaning the throttle body, inspecting and possibly replacing the idle air control valve, and testing the ECM for proper functioning.

5. Can OBDII code P1603 (Lexus) for Engine Stall History be fixed without professional help?

- Depending on your level of automotive expertise, some simple repairs like cleaning the throttle body or replacing the idle air control valve may be performed at home. However, complex issues with the ECM may require professional assistance.

6. Are there any safety concerns associated with OBDII code P1603 (Lexus) and Engine Stall History?

- Yes, engine stalling can pose a safety risk, especially if it happens while driving. It is advised to address this issue promptly to ensure safe operation of the vehicle.

7. How much does it typically cost to repair OBDII code P1603 (Lexus) related to Engine Stall History?

- Repair costs can vary depending on the specific cause of the issue. Simple fixes like cleaning the throttle body may cost less, while replacing the ECM can be more expensive.

8. Can OBDII code P1603 (Lexus) cause permanent damage if left untreated?

- Ignoring OBDII code P1603 related to Engine Stall History can potentially lead to further engine performance issues or even damage if the underlying cause is not addressed in a timely manner.

9. Are there any preventive measures to avoid encountering OBDII code P1603 (Lexus) for Engine Stall History in the future?

- Regular maintenance, such as keeping the throttle body clean and ensuring all engine components are in good condition, can help prevent issues that may trigger this fault code.

10. Is it safe to continue driving my vehicle with OBDII code P1603 (Lexus) indicating Engine Stall History?

- It is not recommended to continue driving the vehicle if you are experiencing engine stalling or other related symptoms. It is best to address the issue promptly to avoid any safety risks.