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Engine-Codes – Generic – P1579

P1579 Code - P/N to D/R at High Throttle Angle - Power Reduction Mode Active

Quick Answer

The diagnostic trouble code P1579 indicates that there is a problem with the transition from Park/Neutral (P/N) to Drive/Reverse (D/R) at high throttle angle, resulting in the activation of the Power Reduction Mode. Common causes include Faulty throttle position sensor, Transmission control module malfunction, Wiring harness issues. 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
P1579 indicates P/N to D/R at High Throttle Angle - Power Reduction Mode Active.
Common causes
Common causes include Faulty throttle position sensor, Transmission control module malfunction, Wiring harness issues.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1579 Description

The diagnostic trouble code P1579 indicates that there is a problem with the transition from Park/Neutral (P/N) to Drive/Reverse (D/R) at high throttle angle, resulting in the activation of the Power Reduction Mode. When this code is triggered, it means that the vehicle's computer has detected a fault in the system that controls the transition between these gear positions when the throttle is open beyond a certain angle. This can lead to a reduction in engine power to prevent potential damage or unsafe driving conditions.

OBDII Code P1579 - P/N to D/R at High Throttle Angle - Power Reduction Mode Active
P1579 Code - P/N to D/R at High Throttle Angle - Power Reduction Mode Active

Common Causes of P1579

  1. Faulty throttle position sensor
  2. Transmission control module malfunction
  3. Wiring harness issues
  4. Mechanical problems in the transmission linkage system
  5. Software glitches in the vehicle's computer system

Symptoms of P1579

  1. Loss of engine power
  2. Difficulty shifting between Park/Neutral and Drive/Reverse
  3. Limp mode activation
  4. Check Engine Light illuminated
  5. Harsh shifting or erratic transmission behavior

How to Fix P1579

  1. Diagnose the underlying cause of the issue using a professional-grade scan tool to retrieve specific trouble codes and data related to the P/N to D/R transition problem.
  2. Inspect the throttle position sensor, transmission control module, wiring harness, and transmission linkage system for any visible damage or signs of wear.
  3. Test the throttle position sensor and transmission control module for proper operation and replace if necessary.
  4. Repair or replace any damaged wiring harness connections or components.
  5. Reset the vehicle's computer system and perform a road test to ensure proper operation of the P/N to D/R transition at high throttle angles.

Cost to Fix P1579

The typical repair costs for addressing the P1579 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor to resolve this problem. Keep in mind that additional diagnostic time and parts may be required, so it's advisable to consult with a reputable auto repair shop for a more accurate cost estimate based on your vehicle's make and model. Labor rates at auto repair shops typically range from $80 to $150 per hour, but rates may vary based on location and shop type.

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Code P1579 Information for Specific Makes

  • P1579 Audi — Throttle Control Unit Basic Setting
  • P1579 Buick — P/N to D/R at High Throttle Angle - Power Reduction Mode Active
  • P1579 Cadillac — P/N to D/R at High Throttle Angle - Power Reduction Mode Active
  • P1579 Chevrolet — P/N to D/R at High Throttle Angle - Power Reduction Mode Active
  • P1579 Ford — Electronic Throttle Control In Power Limiting Mode
  • P1579 GMC — P/N to D/R at High Throttle Angle - Power Reduction Mode Active
  • P1579 Volkswagen — Throttle Control Unit Basic Setting
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 P1579 Code

1. What are the common symptoms of OBDII code P1579?

The common symptoms of OBDII code P1579 include reduced power during acceleration, difficulty shifting gears, and the transmission staying in a single gear.

2. What does the OBDII code P1579 indicate?

OBDII code P1579, also known as "P/N to D/R at High Throttle Angle - Power Reduction Mode Active," indicates that the vehicle's powertrain control module (PCM) has detected an issue with shifting from park (P) to drive (D) or reverse (R) while the throttle angle is high.

3. What are the potential causes of OBDII code P1579?

Potential causes of OBDII code P1579 include a faulty throttle position sensor, issues with the transmission range sensor, a malfunctioning powertrain control module (PCM), wiring or connector problems, or a fault in the transmission itself.

4. How can I diagnose the OBDII code P1579?

Diagnosing OBDII code P1579 typically involves using a scan tool to retrieve the code, checking for any other related trouble codes, inspecting the throttle position sensor and transmission range sensor, and testing the wiring and connectors for faults.

5. How can I repair OBDII code P1579?

To repair OBDII code P1579, you may need to replace a faulty throttle position sensor, repair or replace a malfunctioning transmission range sensor, address any wiring or connector issues, or reprogram the powertrain control module (PCM) if necessary.

6. Can driving with OBDII code P1579 cause further damage to the vehicle?

Continuing to drive with OBDII code P1579 may lead to further damage to the transmission or other related components, as the power reduction mode is activated to prevent potential harm to the drivetrain.

7. Is it safe to continue driving my vehicle with OBDII code P1579?

It is not recommended to continue driving your vehicle with OBDII code P1579, as the reduced power and potential transmission issues can affect the safety and performance of the vehicle.

8. How much does it typically cost to repair OBDII code P1579?

The cost to repair OBDII code P1579 can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I reset the OBDII code P1579 by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it is not a recommended method for addressing the underlying issue causing OBDII code P1579. It's best to diagnose and repair the root cause to prevent the code from reoccurring.

10. Will OBDII code P1579 cause my vehicle to fail an emissions test?

Yes, OBDII code P1579 may cause your vehicle to fail an emissions test, as it indicates a malfunction related to the transmission system, which can impact the vehicle's emissions performance.

Discuss the causes and fixes for P1579 OBDII Code

Submit a New Comment

  • falla se enciende luz chek y se pone en emergencia no acelera a mas de 1500 rpm

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  • Que marca, modelo y año es su auto? Por lo regular el problema es the "Throttle Body"

    Reply to Comment