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Engine-Codes – Generic – P182B

P182B Code - Internal Mode Switch 'B' Circuit Low Voltage

Quick Answer

The P182B diagnostic trouble code (DTC) refers to the Internal Mode Switch 'B' Circuit Low Voltage. Common causes include Faulty internal mode switch, Wiring or connector issues in the internal mode switch circuit, TCM software or hardware malfunction. 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 indicates Internal Mode Switch 'B' Circuit Low Voltage.
Common causes
Common causes include Faulty internal mode switch, Wiring or connector issues in the internal mode switch circuit, TCM software or hardware malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P182B Description

The P182B diagnostic trouble code (DTC) refers to the Internal Mode Switch 'B' Circuit Low Voltage. This code is specific to automatic transmission vehicles and indicates that there is a problem with the internal mode switch circuit 'B' in the transmission control module (TCM). The internal mode switch is responsible for providing information to the TCM about the gear position selected by the driver (such as park, reverse, neutral, drive, etc.).

OBDII Code P182B - Internal Mode Switch 'B' Circuit Low Voltage
P182B Code - Internal Mode Switch 'B' Circuit Low Voltage

Common Causes of P182B

  1. Faulty internal mode switch
  2. Wiring or connector issues in the internal mode switch circuit
  3. TCM software or hardware malfunction
  4. Transmission fluid contamination
  5. Electrical problems in the transmission control module

Symptoms of P182B

  1. Erratic shifting behavior
  2. Harsh or delayed shifting
  3. Transmission getting stuck in a specific gear
  4. Illumination of the check engine light

How to Fix P182B

  1. Diagnose the internal mode switch 'B' circuit using a scan tool to confirm the P182B code.
  2. Inspect the internal mode switch, wiring, and connectors for any visible damage or corrosion.
  3. Test the internal mode switch for proper operation and voltage readings.
  4. Replace the internal mode switch if it is found to be faulty.
  5. Clear the DTC and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P182B

The cost of repairing the Internal Mode Switch 'B' Circuit Low Voltage issue can vary depending on the vehicle make and model, the severity of the problem, and the labor rates of the auto repair shop. On average, the parts for this repair can cost between $50 and $150, while the labor cost can range from $100 to $300. In total, the repair for the P182B code may cost between $150 and $450. It is advisable to consult with a professional mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.

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Code P182B Information for Specific Makes

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 Code

1. What does OBDII code P182B mean?

P182B indicates that the Internal Mode Switch (IMS) 'B' circuit is experiencing low voltage, which can disrupt proper transmission operation.

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

Symptoms may include erratic shifting, the transmission stuck in one gear, poor performance, or the check engine light being illuminated.

3. What causes the P182B code to appear?

This code can be caused by faulty wiring or connections, a malfunctioning Internal Mode Switch, a failed transmission control module (TCM), or low transmission fluid levels.

4. How do I diagnose a P182B code?

Check for damaged or corroded wiring in the IMS 'B' circuit, inspect the Internal Mode Switch for faults, and test the voltage and continuity of the circuit.

5. Can I drive with a P182B code?

Driving with this code is not recommended, as it can lead to transmission damage or unsafe driving conditions due to improper gear shifting.

6. How can I fix a P182B code?

Repairs may involve replacing the Internal Mode Switch, repairing damaged wiring or connectors, updating or reprogramming the TCM, or refilling low transmission fluid.

7. Is the P182B code specific to certain vehicles?

While the code is more common in vehicles with automatic transmissions, its meaning and cause can vary slightly between manufacturers.

8. What tools are needed to troubleshoot a P182B code?

You’ll typically need an OBDII scanner, a multimeter for voltage testing, and possibly a repair manual for the specific vehicle model.

9. How much does it cost to fix a P182B code?

Repair costs vary depending on the issue. Replacing the Internal Mode Switch can cost $150–$400, while wiring repairs or TCM updates may be less expensive.

10. Can low transmission fluid cause a P182B code?

Yes, low transmission fluid can cause improper operation of the Internal Mode Switch, potentially leading to this code.

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