AutoCodes – Chevrolet – P182A 2018 Chevrolet Silverado

P182A 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 597

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Internal Mode Switch 'A' Circuit Low Voltage - AutoCodes.com — P182A 2018 Chevrolet Silverado Code - Internal Mode Switch 'A' Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P182A 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What does the OBDII code P182A mean on a 2018 Chevrolet Silverado?

The code P182A indicates an issue with the Internal Mode Switch 'A' Circuit experiencing low voltage, which is part of the transmission control system.

2. What are common symptoms of the P182A code on a Chevy Silverado?

Symptoms may include difficulty shifting gears, the transmission staying in limp mode, delayed or harsh shifting, and the check engine light illuminating.

3. What causes the P182A code on a 2018 Chevrolet Silverado?

Common causes include damaged wiring or connectors, a faulty internal mode switch, transmission fluid contamination, or an issue with the transmission control module.

4. Can driving with the P182A code damage my vehicle?

Yes, driving with this code can lead to further transmission damage or unsafe driving conditions due to shifting issues.

5. How is the P182A code diagnosed?

A mechanic will inspect the wiring and connectors for damage, check the transmission fluid condition, and use a scan tool to monitor the internal mode switch and transmission control module.

6. How do I fix the P182A code on my Chevy Silverado?

Repairs may include replacing damaged wiring, connectors, or the internal mode switch, flushing or replacing the transmission fluid, or reprogramming the transmission control module.

7. Is the internal mode switch expensive to replace?

The cost of replacing the internal mode switch depends on labor rates and parts availability, but it typically ranges between $200 and $600.

8. Can a low transmission fluid level cause the P182A code?

Low or contaminated transmission fluid can lead to electrical issues within the transmission, potentially triggering the P182A code.

9. Do I need to reprogram the transmission control module for the P182A code?

Reprogramming may be necessary if the transmission control module is identified as the root cause of the issue.

10. Can I clear the P182A code without fixing the problem?

Clearing the code without addressing the issue may result in the code returning and continued transmission problems. Repairing the underlying cause is crucial.