AutoCodes – Buick – P182D Buick

P182D Buick Code - Internal Mode Switch 'P' Circuit High 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: P182D Buick indicates Internal Mode Switch 'P' Circuit High 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 905

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 P182D Buick 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 P signal circuit voltage is greater than 2.38 V, for 1.75 s.

OBDII Code P182D Buick - Internal Mode Switch 'P' Circuit High Voltage - AutoCodes.com — P182D Buick Code - Internal Mode Switch 'P' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182D Buick?

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 P182D Buick?

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 P182D Buick 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.

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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 P182D Buick Code

1. What does the OBDII code P182D mean on a Buick?

P182D indicates an issue with the Internal Mode Switch 'P' Circuit, specifically that the circuit is detecting high voltage when it shouldnâ€™t.

2. What are the common symptoms of the P182D code in a Buick?

Common symptoms include difficulty shifting into or out of park, the transmission stuck in a single gear, or the check engine light being illuminated.

3. What causes the P182D code to appear in a Buick?

The code is typically caused by a faulty internal mode switch, damaged wiring, a poor electrical connection, or a malfunctioning transmission control module (TCM).

4. Can driving with the P182D code cause damage to my Buick?

Driving with this code may not immediately harm your vehicle, but unresolved transmission issues can lead to further mechanical damage over time.

5. How do I diagnose the P182D code in a Buick?

Diagnosing involves using an OBDII scanner to confirm the code, inspecting the internal mode switch and its wiring for damage, and testing the circuit voltage and continuity.

6. Can I fix the P182D code on my Buick myself?

If you are experienced with automotive electrical systems, you can inspect and repair damaged wiring or connections. However, replacing the internal mode switch or TCM may require professional assistance.

7. How much does it cost to repair the P182D code on a Buick?

Repair costs vary, but replacing an internal mode switch can range from $150 to $400, while labor and diagnostics may add $100 to $200.

8. Is the P182D code common in all Buick models?

The P182D code is most commonly reported in Buick models with automatic transmissions that use an internal mode switch for gear selection.

9. What tools are needed to troubleshoot the P182D code on a Buick?

Youâ€™ll need an OBDII scanner, a multimeter for testing electrical connections, and potentially a wiring diagram for your specific Buick model.

10. Can a software update fix the P182D code on a Buick?

In rare cases, a TCM software update from a dealership may resolve the issue, but this is only applicable if the problem is due to a known software glitch.