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P1824 2016 GMC Sierra Code - Internal Mode Switch 'P' Circuit Low Voltage

Quick Answer

The diagnostic trouble code P1824 in a 2016 GMC Sierra indicates a problem with the Internal Mode Switch 'P' Circuit, specifically a low voltage issue. Common causes include Faulty Internal Mode Switch, Wiring issues in the 'P' circuit, Loose or corroded electrical connections. 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
P1824 2016 GMC Sierra indicates Internal Mode Switch 'P' Circuit Low Voltage.
Common causes
Common causes include Faulty Internal Mode Switch, Wiring issues in the 'P' circuit, Loose or corroded electrical connections.
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 15, 2024
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Code P1824 2016 GMC Sierra Description

The diagnostic trouble code P1824 in a 2016 GMC Sierra indicates a problem with the Internal Mode Switch 'P' Circuit, specifically a low voltage issue. The Internal Mode Switch (IMS) is a component within the transmission control module that helps the vehicle's computer determine the current gear selection. When the voltage in the 'P' circuit is lower than expected, it can lead to various issues in the vehicle's operation.

OBDII Code P1824 2016 GMC Sierra - Internal Mode Switch 'P' Circuit Low Voltage
P1824 2016 GMC Sierra Code - Internal Mode Switch 'P' Circuit Low Voltage

Common Causes of P1824 2016 GMC Sierra

  1. Faulty Internal Mode Switch
  2. Wiring issues in the 'P' circuit
  3. Loose or corroded electrical connections
  4. Faulty transmission control module
  5. Low battery voltage affecting the circuit

Symptoms of P1824 2016 GMC Sierra

  1. Erratic shifting patterns
  2. Difficulty in selecting gears
  3. Transmission slipping
  4. Vehicle not starting

How to Fix P1824 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the Internal Mode Switch and the 'P' circuit wiring for any visible damage or corrosion.
  2. Test the voltage in the 'P' circuit to determine if it is within the specified range. If the voltage is low, further diagnosis is needed.
  3. Check and tighten any loose electrical connections in the circuit.
  4. If the Internal Mode Switch is faulty, replace it with a new one following manufacturer guidelines.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1824 2016 GMC Sierra

The typical repair costs for addressing the Internal Mode Switch 'P' Circuit Low Voltage issue in a 2016 GMC Sierra can range from $200 to $500, including parts and labor. However, actual costs may vary depending on the specific diagnosis time and labor rates at auto repair shops, which can be influenced by factors such as location, vehicle make and model, and engine type. It is advisable to inquire about local rates for a more accurate estimate.

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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 P1824 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P1824 in a 2016 GMC Sierra?

The common symptoms of OBDII code P1824 (Internal Mode Switch 'P' Circuit Low Voltage) in a 2016 GMC Sierra may include issues with shifting gears, the transmission not engaging properly, or the vehicle going into limp mode.

2. What causes the OBDII code P1824 in a 2016 GMC Sierra?

The most common cause of OBDII code P1824 in a 2016 GMC Sierra is a malfunction in the internal mode switch, which can lead to low voltage in the 'P' circuit.

3. How serious is OBDII code P1824 in a 2016 GMC Sierra?

OBDII code P1824 in a 2016 GMC Sierra can affect the proper functioning of the transmission, potentially leading to drivability issues. It is important to address this code promptly to avoid further damage.

4. Can I continue driving my 2016 GMC Sierra with OBDII code P1824?

It is not recommended to continue driving your 2016 GMC Sierra with OBDII code P1824, as it can cause further damage to the transmission. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair OBDII code P1824 in my 2016 GMC Sierra?

Diagnosing and repairing OBDII code P1824 in a 2016 GMC Sierra typically involves checking the internal mode switch for proper operation, inspecting the wiring and connectors for any damage, and testing the circuit for voltage issues. Replacement of the internal mode switch may be necessary.

6. Can a DIYer fix OBDII code P1824 in a 2016 GMC Sierra?

While some experienced DIYers may be able to diagnose and repair OBDII code P1824 in a 2016 GMC Sierra, it is recommended to consult a professional mechanic or dealership for accurate diagnosis and proper repair to ensure the issue is resolved correctly.

7. How much does it cost to repair OBDII code P1824 in a 2016 GMC Sierra?

The cost to repair OBDII code P1824 in a 2016 GMC Sierra can vary depending on the extent of the issue, the parts needed for repair, and labor costs. It is advisable to get a few quotes from different repair shops or dealerships to compare prices.

8. Will resetting the OBDII code P1824 in my 2016 GMC Sierra make it go away?

Resetting the OBDII code P1824 in a 2016 GMC Sierra may temporarily clear the error code, but if the underlying issue is not addressed and repaired, the code is likely to return. It is essential to diagnose and fix the root cause of the problem.

9. Is OBDII code P1824 covered under warranty for a 2016 GMC Sierra?

Whether OBDII code P1824 is covered under warranty for a 2016 GMC Sierra depends on the specific warranty coverage and the age/mileage of the vehicle. It is recommended to check with the dealership or refer to the vehicle's warranty documentation for more information.

10. Can OBDII code P1824 in a 2016 GMC Sierra cause permanent damage if not addressed promptly?

If OBDII code P1824 in a 2016 GMC Sierra is not addressed promptly, it can potentially cause permanent damage to the transmission or other related components. It is best to address the issue as soon as possible to prevent further damage.

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