AutoCodes – Toyota – P1605 2018 Toyota RAV4

P1605 2018 Toyota RAV4 Code - Engine Rough Idling

Quick Answer

After starting the engine, this Diagnostic Trouble Code (DTC) is stored if the engine speed drops below the set speed. 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: P1605 2018 Toyota RAV4 indicates Engine Rough Idling.
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 1,311

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1605 2018 Toyota RAV4 Description

After starting the engine, this Diagnostic Trouble Code (DTC) is stored if the engine speed drops below the set speed. 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 P1605 2018 Toyota RAV4 - Engine Rough Idling - AutoCodes.com — P1605 2018 Toyota RAV4 Code - Engine Rough Idling

What does this mean?

What are the Possible Causes of the DTC P1605 2018 Toyota RAV4?

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 P1605 2018 Toyota RAV4?

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 P1605 2018 Toyota RAV4 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 P1605 2018 Toyota RAV4 code?

Need more information on how to fix the P1605 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

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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 P1605 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P1605 in a 2018 Toyota RAV4?

- Common symptoms include engine rough idling, stalling, and reduced overall engine performance.

2. What could be causing the engine rough idling in a 2018 Toyota RAV4 triggering code P1605?

- The code P1605 in a 2018 Toyota RAV4 could be caused by issues with the throttle position sensor, faulty wiring, or a malfunctioning PCM.

3. How can I diagnose the source of the OBDII code P1605 in my 2018 Toyota RAV4?

- To diagnose the issue, you can use an OBDII scanner to retrieve the trouble code and then further inspect the throttle position sensor, wiring connections, and the PCM for any signs of damage or malfunction.

4. Can a dirty or faulty throttle body cause code P1605 in a 2018 Toyota RAV4?

- Yes, a dirty or faulty throttle body can disrupt the proper functioning of the throttle position sensor, leading to engine rough idling and triggering code P1605.

5. Is it safe to drive my 2018 Toyota RAV4 with the OBDII code P1605 and experiencing rough idling?

- It is not recommended to drive your vehicle with code P1605 and rough idling as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

6. How can I reset the OBDII code P1605 in my 2018 Toyota RAV4?

- You can reset the code by using an OBDII scanner to clear the trouble code. However, it's important to diagnose and fix the underlying issue causing the code before resetting it.

7. Will cleaning the throttle body help resolve the engine rough idling associated with code P1605 in a 2018 Toyota RAV4?

- Cleaning the throttle body can sometimes help improve engine performance and resolve rough idling issues, especially if the problem is caused by dirt or carbon buildup.

8. Can a malfunctioning oxygen sensor trigger OBDII code P1605 in a 2018 Toyota RAV4?

- While it's less common, a malfunctioning oxygen sensor could potentially affect engine performance and trigger code P1605 if it leads to incorrect air-fuel mixture readings.

9. How much does it typically cost to repair OBDII code P1605 in a 2018 Toyota RAV4?

- The cost of repairing code P1605 can vary depending on the exact cause of the issue. It could range from a few hundred to over a thousand dollars, including parts and labor.

10. Should I attempt to repair OBDII code P1605 in my 2018 Toyota RAV4 myself, or is it better to seek professional help?

- If you have experience with automotive repairs and access to the necessary tools, you may attempt to diagnose and fix the issue causing code P1605. However, if you're unsure or lack the expertise, it's advisable to seek professional help to ensure proper diagnosis and repair.