AutoCodes – Buick – P182B Buick

P182B Buick Code - Internal Mode Switch 'B' 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: P182B Buick indicates Internal Mode Switch 'B' 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 1,329

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 P182B 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 B signal circuit voltage is less than 0.7 V, for 1.75 s.

OBDII Code P182B Buick - Internal Mode Switch 'B' Circuit Low Voltage - AutoCodes.com — P182B Buick Code - Internal Mode Switch 'B' Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P182B 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 P182B 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 P182B 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 P182B Buick Code

1. What does the OBDII code P182B mean on a Buick?

P182B indicates a problem with the Internal Mode Switch 'B' Circuit, specifically that the voltage is too low, which may affect the transmission's ability to detect gear positions.

2. What are the common symptoms of a P182B code in a Buick?

Symptoms may include difficulty shifting gears, the transmission being stuck in one gear, erratic shifting, or the illumination of the check engine light.

3. What causes the P182B code to appear in a Buick?

Common causes include damaged wiring or connectors in the Internal Mode Switch circuit, a faulty mode switch, low system voltage, or a malfunctioning transmission control module (TCM).

4. Can I drive my Buick with a P182B code?

While the vehicle may still operate, driving with this code can lead to further transmission issues or unsafe driving conditions, so itâ€™s best to address the issue promptly.

5. How do I diagnose a P182B code on my Buick?

Start by inspecting the wiring and connectors for the Internal Mode Switch for damage or corrosion, check for proper voltage and ground at the switch, and test the switch for functionality.

6. What tools are needed to troubleshoot the P182B code?

Youâ€™ll need an OBDII scanner, a multimeter to test voltage and continuity, and possibly a wiring diagram for the transmission system.

7. How do I fix the P182B code on a Buick?

Repairs may include repairing or replacing damaged wiring or connectors, replacing the Internal Mode Switch, or reprogramming/updating the TCM if necessary.

8. How much does it cost to repair a P182B code on a Buick?

Costs can vary widely depending on the issue, but repairs typically range from $150 to $500, with mode switch replacement being the most common fix.

9. Can a weak battery cause the P182B code?

Yes, a weak or failing battery can cause low voltage in the circuit, triggering this code. Ensure the battery and charging system are in good condition.

10. Does the P182B code always mean the Internal Mode Switch is faulty?

No, while the switch is a common culprit, the issue could also stem from related wiring, connectors, or the TCM, so a thorough diagnosis is essential.