AutoCodes – GMC – P182A 2016 GMC Sierra

P182A 2016 GMC Sierra Code - Internal Mode Switch 'A' Circuit Low Voltage

Quick Answer

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch 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: P182A 2016 GMC Sierra indicates Internal Mode Switch 'A' Circuit Low Voltage.
Common causes: Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode Switch 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 224

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P182A 2016 GMC Sierra Description

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. The internal mode switch consists of 5 separate hall effect switches. Each hall effect switch is supplied with a 9 V reference circuit and a signal circuit from the TCM. Each signal circuit for each gear selector position will have either a voltage reading of 0.70–0.96 V indicating On or 1.68–2.38 V indicating Off. The voltage values on each internal mode switch circuit will change and are dependent on the position of the gear selector. The state of each internal mode switch A/B/C/P/S signal circuit is displayed on the scan tool. The Diagnostic Trouble Code (DTC) will be set when the TCM has detected the internal mode switch A signal circuit voltage is less than 0.7 V, for 1.75 s.

OBDII Code P182A 2016 GMC Sierra - Internal Mode Switch 'A' Circuit Low Voltage - AutoCodes.com — P182A 2016 GMC Sierra Code - Internal Mode Switch 'A' Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P182A 2016 GMC Sierra?

Faulty Transmission Internal Mode Switch
Transmission Internal Mode Switch harness is open or shorted
Transmission Internal Mode Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P182A 2016 GMC Sierra?

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 P182A 2016 GMC Sierra 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 P182A 2016 GMC Sierra code?

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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 P182A 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P182A in a 2016 GMC Sierra?

The common symptoms of OBDII code P182A, Internal Mode Switch 'A' Circuit Low Voltage, in a 2016 GMC Sierra may include issues with shifting gears, the transmission not engaging properly, and the vehicle going into "limp mode."

2. What are the potential causes of OBDII code P182A in a 2016 GMC Sierra?

The potential causes of OBDII code P182A in a 2016 GMC Sierra include a faulty internal mode switch, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module (TCM).

3. How can I diagnose OBDII code P182A in my 2016 GMC Sierra?

Diagnosing OBDII code P182A in a 2016 GMC Sierra typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the internal mode switch and its circuit for any visible damage, and testing the TCM for proper functioning.

4. Can I still drive my 2016 GMC Sierra with OBDII code P182A present?

It is not recommended to drive your 2016 GMC Sierra with OBDII code P182A present, as it can lead to transmission issues and potential safety hazards. It is best to address the underlying problem promptly.

5. How can I repair OBDII code P182A in my 2016 GMC Sierra?

Repairing OBDII code P182A in a 2016 GMC Sierra may involve replacing the internal mode switch, repairing any damaged wiring or connectors, or reprogramming the TCM. It is advisable to consult a professional mechanic for accurate diagnosis and repair.

6. Is OBDII code P182A a serious issue in a 2016 GMC Sierra?

OBDII code P182A can be a serious issue in a 2016 GMC Sierra as it affects the proper functioning of the transmission. Ignoring this code can lead to further damage and costly repairs down the line.

7. Can a DIY enthusiast fix OBDII code P182A in a 2016 GMC Sierra?

While some DIY enthusiasts may be able to address OBDII code P182A by replacing the internal mode switch or checking for wiring issues, it is recommended to seek professional help for accurate diagnosis and repair to ensure the problem is resolved effectively.

8. How much does it cost to repair OBDII code P182A in a 2016 GMC Sierra?

The cost to repair OBDII code P182A in a 2016 GMC Sierra can vary depending on the underlying cause, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics or service centers for an accurate estimate.

9. Will resetting the OBDII system clear code P182A in a 2016 GMC Sierra?

Resetting the OBDII system may temporarily clear the code P182A in a 2016 GMC Sierra, but if the underlying issue is not addressed, the code is likely to reappear. It is crucial to diagnose and fix the root cause of the problem.

10. How often does OBDII code P182A occur in a 2016 GMC Sierra?

OBDII code P182A, Internal Mode Switch 'A' Circuit Low Voltage, can occur in a 2016 GMC Sierra due to various factors such as wear and tear, electrical issues, or component failure. The frequency may vary depending on the vehicle's usage and maintenance history.