AutoCodes – Lexus – P1656 Lexus

P1656 Lexus Code - Oil Control Valve Circuit Malfunction

Quick Answer

Variable Valve Timing (VVT) system controls the intake valve timing to proper timing in response to driving condition. Common causes include Faulty Oil Control Valve (OCV), Oil Control Valve (OCV) harness is open or shorted, Oil Control Valve (OCV) circuit poor electrical 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: P1656 Lexus indicates Oil Control Valve Circuit Malfunction.
Common causes: Common causes include Faulty Oil Control Valve (OCV), Oil Control Valve (OCV) harness is open or shorted, Oil Control Valve (OCV) circuit poor electrical 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.

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Code Popularity 33,252

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 Sep 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1656 Lexus Description

Variable Valve Timing (VVT) system controls the intake valve timing to proper timing in response to driving condition. The Engine Control Module (ECM) controls Oil Control Valve (OCV) to make the intake valve timing properly, and, oil pressure controlled with OCV is supplied to the VVT controller, and then, VVT controller changes relative position between the camshaft and the crankshaft.

OBDII Code P1656 Lexus - Oil Control Valve Circuit Malfunction - AutoCodes.com — P1656 Lexus Code - Oil Control Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1656 Lexus?

Faulty Oil Control Valve (OCV)
Oil Control Valve (OCV) harness is open or shorted
Oil Control Valve (OCV) circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1656 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 P1656 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 P1656 Lexus code?

Need more information on how to fix the P1656 Lexus 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 P1656 Lexus Code

1. What are the common symptoms of OBDII code P1656 in a Lexus related to the Oil Control Valve Circuit Malfunction?

- Common symptoms include rough idling, engine misfires, poor acceleration, and a decrease in fuel efficiency.

2. What are the possible causes of the Oil Control Valve Circuit Malfunction in a Lexus triggering code P1656?

- The code may be caused by issues such as a faulty oil control valve, damaged wiring or connectors, low oil levels, or sludge buildup in the engine.

3. How can I diagnose the OBDII code P1656 in my Lexus related to the Oil Control Valve Circuit Malfunction?

- Diagnosis typically involves using a scan tool to read the code, checking the oil control valve and its circuit for proper operation, and inspecting the wiring and connectors for any damage.

4. Can I continue driving my Lexus with the OBDII code P1656 indicating an Oil Control Valve Circuit Malfunction?

- It's not recommended to continue driving with this code present, as it can lead to potential engine damage or performance issues. It's best to address the underlying problem promptly.

5. How can I repair the Oil Control Valve Circuit Malfunction in my Lexus causing the P1656 code?

- Repair may involve replacing the faulty oil control valve, repairing damaged wiring or connectors, ensuring proper oil levels and cleanliness, and clearing the trouble code with a scan tool.

6. Are there any preventive maintenance tips to avoid encountering the OBDII code P1656 in a Lexus?

- Regularly scheduled oil changes, using high-quality oil, maintaining proper engine cleanliness, and addressing any warning signs promptly can help prevent issues leading to this code.

7. Can a DIY enthusiast fix the Oil Control Valve Circuit Malfunction triggering the P1656 code in a Lexus?

- While some individuals may have the skills to address this issue themselves, it's recommended to consult a professional mechanic for proper diagnosis and repair to avoid further complications.

8. How long does it typically take to repair the Oil Control Valve Circuit Malfunction causing the P1656 code in a Lexus?

- The repair time can vary depending on the exact cause of the issue and the extent of the repair needed but may take anywhere from a few hours to a full day.

9. Will resetting the OBDII code P1656 related to the Oil Control Valve Circuit Malfunction make the problem go away permanently?

- Simply resetting the code without addressing the underlying issue will not fix the problem permanently. It's crucial to diagnose and repair the root cause to prevent the code from reoccurring.

10. Is it safe to ignore the OBDII code P1656 in a Lexus linked to the Oil Control Valve Circuit Malfunction if the vehicle seems to be running fine?

- Ignoring the code can lead to potential engine damage or performance issues over time. It's best to address the problem promptly to ensure the continued proper functioning of your vehicle.