AutoCodes – Toyota – C1591 Toyota

C1591 Toyota 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 Toyota 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 5,753

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

What does this mean?

What are the Possible Causes of the DTC C1591 Toyota?

Actuator Neutral Position Calibration

How to Fix the DTC C1591 Toyota?

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 Toyota 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 C1591 Toyota code?

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

Need Help with the Code?

Get the C1591 Toyota 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 Toyota Code

1. What are the common symptoms of OBDII code C1591 in a Toyota related to Actuator Neutral Position Calibration Undone?

The common symptoms include the Check Engine Light coming on, issues with shifting gears, and potential loss of power steering functionality.

2. What causes OBDII code C1591 in a Toyota related to Actuator Neutral Position Calibration Undone?

The code can be triggered by a malfunction in the actuator, faulty wiring or connectors, or a problem with the neutral position sensor.

3. How can I diagnose OBDII code C1591 in my Toyota for Actuator Neutral Position Calibration Undone?

Diagnosis involves using an OBDII scanner to retrieve the code, checking the actuator and related components for any visible damage, and testing the sensor for proper functionality.

4. Can I drive my Toyota with OBDII code C1591 related to Actuator Neutral Position Calibration Undone?

It is not recommended to drive your vehicle with this code as it can lead to potential safety hazards and further damage to the transmission system.

5. How do I repair OBDII code C1591 in a Toyota related to Actuator Neutral Position Calibration Undone?

Repairing the issue involves recalibrating the actuator neutral position, checking and repairing any damaged wiring or connectors, and replacing the neutral position sensor if necessary.

6. Can I reset OBDII code C1591 in my Toyota related to Actuator Neutral Position Calibration Undone?

Resetting the code can be done using an OBDII scanner after the underlying issue has been diagnosed and repaired.

7. Is OBDII code C1591 related to Actuator Neutral Position Calibration Undone a common problem in Toyota vehicles?

While not extremely common, this code can occur in Toyota vehicles, particularly in older models or those with high mileage.

8. How much does it cost to repair OBDII code C1591 in a Toyota for Actuator Neutral Position Calibration Undone?

The cost of repair can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is recommended to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code C1591 in a Toyota related to Actuator Neutral Position Calibration Undone?

DIY enthusiasts with the right tools and knowledge may be able to diagnose and repair this issue, but it is recommended to have a professional mechanic handle the repair to ensure it is done correctly.

10. How often should I have the actuator neutral position recalibrated in my Toyota to prevent OBDII code C1591 from occurring?

It is recommended to have the actuator neutral position recalibrated during regular maintenance intervals or whenever you notice any symptoms indicating a potential issue with the calibration.