AutoCodes – Lexus – C1591 Lexus

C1591 Lexus Code - Actuator Neutral Position Calibration Undone

Quick Answer

If the Steering Control ECU or steering actuator is replaced, or if the tie-rod ends are adjusted, Variable Gear Ratio Steering (VGRS) system calibration is required. Common causes include Actuator Neutral Position Calibration. 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: C1591 Lexus indicates Actuator Neutral Position Calibration Undone.
Common causes: Common causes include Actuator Neutral Position Calibration.
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 12,093

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 Nov 05, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1591 Lexus Description

If the Steering Control ECU or steering actuator is replaced, or if the tie-rod ends are adjusted, Variable Gear Ratio Steering (VGRS) system calibration is required. If the Steering Control ECU detects that steering angle adjustment is incomplete, it will store the Diagnostic Trouble Code (DTC) C1591.

OBDII Code C1591 Lexus - Actuator Neutral Position Calibration Undone - AutoCodes.com — C1591 Lexus Code - Actuator Neutral Position Calibration Undone

What does this mean?

What are the Possible Causes of the DTC C1591 Lexus?

Actuator Neutral Position Calibration

How to Fix the DTC C1591 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

There is no malfunction if this DTC is not output again after performing VGRS system calibration.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1591 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.

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Need more information on how to fix the C1591 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1591 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 C1591 Lexus Code

1. What are the common symptoms of OBDII code C1591 in a Lexus related to actuator neutral position calibration?

- Common symptoms include rough idling, poor acceleration, and issues with shifting gears.

2. What can cause the actuator neutral position calibration to become undone in a Lexus triggering code C1591?

- The most common causes are battery disconnect or replacement, faulty wiring, or a malfunction in the actuator itself.

3. How can I repair the actuator neutral position calibration issue in my Lexus when OBDII code C1591 is triggered?

- To fix this issue, you will need to perform the neutral position calibration using a compatible diagnostic tool or have a professional mechanic recalibrate the actuator.

4. Can I continue driving my Lexus with OBDII code C1591 related to actuator neutral position calibration undone?

- It is not recommended to continue driving the vehicle with this issue as it can lead to further damage to the transmission system.

5. Will resetting the OBDII code C1591 in my Lexus fix the actuator neutral position calibration problem?

- Simply clearing the code will not resolve the underlying issue causing the calibration problem. It is crucial to address the root cause and recalibrate the actuator.

6. How long does it take to recalibrate the actuator neutral position in a Lexus to resolve OBDII code C1591?

- The recalibration process can vary depending on the diagnostic tool used and the expertise of the technician, but it typically takes around 30 minutes to an hour.

7. Is it possible to prevent OBDII code C1591 related to actuator neutral position calibration from occurring in my Lexus?

- Regular maintenance checks, avoiding sudden power interruptions, and ensuring the battery is properly connected can help prevent this issue from happening.

8. Can a DIY enthusiast recalibrate the actuator neutral position in a Lexus to clear OBDII code C1591?

- While some DIY enthusiasts may have the skills and tools to recalibrate the actuator, it is recommended to seek professional help to ensure the calibration is done accurately.

9. Are there any software updates or recalls from Lexus related to OBDII code C1591 and actuator neutral position calibration?

- It is advisable to check with your local Lexus dealership or authorized service center for any available software updates or recalls related to this issue.

10. What is the typical cost to fix the actuator neutral position calibration problem in a Lexus triggering OBDII code C1591?

- The cost can vary depending on the extent of the issue and the labor rates in your area, but it typically ranges from $200 to $500 for recalibration and related repairs.