AutoCodesCadillac – P182F Cadillac

P182F Cadillac Code - Internal Mode Switch 'C' 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
P182F Cadillac indicates Internal Mode Switch 'C' 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 1,007
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 23, 2024
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Code P182F Cadillac 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 C signal circuit voltage is greater than 2.38 V, for 1.75 s.
OBDII Code P182F Cadillac - Internal Mode Switch 'C' Circuit High Voltage - AutoCodes.com
P182F Cadillac Code - Internal Mode Switch 'C' Circuit High Voltage

What are the Possible Causes of the DTC P182F Cadillac?

  • 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 P182F Cadillac?

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 P182F Cadillac 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 P182F Cadillac Code

1. What does the OBDII code P182F mean on a Cadillac?

The P182F code indicates an issue with the Internal Mode Switch 'C' circuit, specifically detecting a high voltage condition.

2. What are the symptoms of code P182F in a Cadillac?

Common symptoms include the transmission staying in the wrong gear, difficulty shifting, the check engine light turning on, and erratic transmission behavior.

3. What causes the P182F code to appear in a Cadillac?

This code is usually caused by a faulty transmission range switch, damaged wiring or connectors, a short circuit, or issues with the transmission control module (TCM).

4. Can I drive my Cadillac with the P182F code?

Driving with this code is not recommended as it may lead to further transmission damage or unsafe driving conditions due to improper gear engagement.

5. How do you diagnose the P182F code on a Cadillac?

Diagnosis involves scanning for codes, inspecting the Internal Mode Switch and related wiring, testing for high voltage at the switch circuit, and checking the transmission control module.

6. How is the P182F code typically fixed on a Cadillac?

Repairs may include replacing the Internal Mode Switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the transmission control module.

7. How much does it cost to fix the P182F code on a Cadillac?

Repair costs vary, but replacing the Internal Mode Switch typically ranges from $200 to $500, depending on labor rates and parts availability.

8. Can a low battery cause the P182F code on a Cadillac?

A low battery is unlikely to directly cause this code, but electrical issues such as voltage fluctuations can contribute to transmission circuit problems.

9. Is the P182F code specific to Cadillacs?

While the P182F code can appear on other makes, it is commonly associated with Cadillac vehicles due to their specific transmission systems.

10. Does clearing the P182F code solve the problem?

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.

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