AutoCodes – Generic – P1558

P1558 Code - Throttle Actuator Electrical Malfunction

Quick Answer

P1558 indicates Throttle Actuator Electrical Malfunction. Common causes include Faulty Throttle Valve Control Module, Throttle Valve Control Module harness is open or shorted, Throttle Valve Control Module 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: P1558 indicates Throttle Actuator Electrical Malfunction.
Common causes: Common causes include Faulty Throttle Valve Control Module, Throttle Valve Control Module harness is open or shorted, Throttle Valve Control Module 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 20,168

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 Aug 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1558 Description

OBDII Code P1558 - Throttle Actuator Electrical Malfunction - AutoCodes.com — P1558 Code - Throttle Actuator Electrical Malfunction

What does this mean?

What are the Possible Causes of the DTC P1558?

Faulty Throttle Valve Control Module
Throttle Valve Control Module harness is open or shorted
Throttle Valve Control Module circuit poor electrical connection

How to Fix the DTC P1558?

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 P1558 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 P1558 code?

Need more information on how to fix the P1558 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1558 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1558 Audi — Throttle Actuator Electrical Malfunction
P1558 Buick — Cruise Control Servo Indicates Low
P1558 Cadillac — Cruise Control Servo Indicates Low
P1558 Chevrolet — Cruise Control Servo Indicates Low
P1558 GMC — Cruise Control Servo Indicates Low
P1558 Volkswagen — Throttle Actuator Electrical Malfunction

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 P1558 Code

1. What are the common symptoms of OBDII code P1558 (Throttle Actuator Electrical Malfunction)?

- Common symptoms include rough idling, stalling, loss of power, and an illuminated check engine light.

2. What are the possible causes of OBDII code P1558?

- Possible causes include a faulty throttle actuator, damaged wiring or connectors, a defective throttle position sensor, or a malfunctioning electronic throttle control module.

3. How can I diagnose OBDII code P1558?

- Diagnosing this code usually involves using a scan tool to retrieve the specific trouble code, checking the throttle actuator for proper operation, inspecting related wiring and connectors for damage, and testing the throttle position sensor.

4. Can I drive my vehicle with OBDII code P1558?

- It is not recommended to drive your vehicle with this code present, as it can lead to unsafe driving conditions and potential damage to the engine or other components.

5. How can I repair OBDII code P1558?

- Repair options may include replacing the throttle actuator, repairing or replacing damaged wiring or connectors, replacing the throttle position sensor, or reprogramming the electronic throttle control module.

6. Is it possible to reset OBDII code P1558 without repairs?

- While clearing the trouble code may temporarily turn off the check engine light, it is not a recommended solution as the underlying issue causing the code will still remain unresolved.

7. How much does it typically cost to fix OBDII code P1558?

- The cost of fixing this code can vary depending on the specific cause of the issue, but repairs may range from $200 to $800 or more, including parts and labor.

8. Can a DIY enthusiast repair OBDII code P1558 at home?

- Depending on the root cause of the issue, some DIY enthusiasts with the necessary tools and experience may be able to address this code at home. However, complex electrical or mechanical repairs may require professional assistance.

9. What is the role of the throttle actuator in a vehicle?

- The throttle actuator controls the opening and closing of the throttle valve, regulating the airflow into the engine and ultimately affecting engine performance and fuel efficiency.

10. Are there any preventive measures to avoid OBDII code P1558 in the future?

- Regular maintenance, such as cleaning the throttle body, inspecting wiring harnesses for damage, and addressing any abnormal symptoms promptly, can help prevent issues that may trigger OBDII code P1558.