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Engine-Codes – GMC – P162C GMC

P162C GMC Code - Vehicle Speed Limiting/Warning Switch Circuit

Quick Answer

The P162C diagnostic trouble code (DTC) for GMC vehicles specifically refers to an issue with the Vehicle Speed Limiting/Warning Switch Circuit. Common causes include Malfunctioning speed sensor, Damaged wiring or connections in the speed limiting system circuit, Faulty speed limiting/ warning switch. 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
P162C GMC indicates Vehicle Speed Limiting/Warning Switch Circuit.
Common causes
Common causes include Malfunctioning speed sensor, Damaged wiring or connections in the speed limiting system circuit, Faulty speed limiting/ warning switch.
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 10, 2024
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Code P162C GMC Description

The P162C diagnostic trouble code (DTC) for GMC vehicles specifically refers to an issue with the Vehicle Speed Limiting/Warning Switch Circuit. This code is triggered when the vehicle's computer detects a problem with the circuit responsible for monitoring the vehicle's speed limiting or warning system. The speed limiting system is designed to prevent the vehicle from exceeding a certain speed, often for safety or regulatory reasons. The warning system, on the other hand, alerts the driver when the vehicle is approaching a predetermined speed limit.

OBDII Code P162C GMC - Vehicle Speed Limiting/Warning Switch Circuit
P162C GMC Code - Vehicle Speed Limiting/Warning Switch Circuit

Common Causes of P162C GMC

  1. Malfunctioning speed sensor.
  2. Damaged wiring or connections in the speed limiting system circuit.
  3. Faulty speed limiting/ warning switch.
  4. Issues with the vehicle's computer system or software.

Symptoms of P162C GMC

  1. Inaccurate speed readings on the vehicle's dashboard.
  2. Inability to engage or adjust the vehicle's speed limiting feature.
  3. Lack of warning alerts when approaching speed limits.
  4. Illumination of the check engine light on the dashboard.

How to Fix P162C GMC

  1. Perform a comprehensive diagnostic scan to confirm the P162C code and identify the specific component causing the issue.
  2. Inspect the speed sensor, wiring, and switch for any visible damage or faults.
  3. Repair or replace any faulty components, such as the sensor, wiring, or switch.
  4. Clear the DTC from the vehicle's computer system and test the speed limiting and warning systems to ensure they are functioning properly.
  5. Conduct a road test to verify that the issue has been successfully resolved and that the vehicle's speed limiting and warning features are operating as intended.

Cost to Fix P162C GMC

The cost of repairing the P162C code for GMC vehicles can vary depending on the specific components that need to be replaced and the labor involved. Typically, the parts required for this repair may range from $50 to $200, while the labor costs can be between $100 and $300. Overall, the total repair cost could fall in the range of $150 to $500. It's important to note that these are rough estimates, and actual costs may differ based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the issue. It's recommended to consult with a certified mechanic or auto repair shop for a more accurate cost estimate.

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Information for Specific GMC Models

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 P162C GMC Code

1. What are the common symptoms of OBDII code P162C GMC?

- Common symptoms include the vehicle speed being limited, a warning message displayed on the dashboard, and the vehicle going into a limp mode.

2. What causes the OBDII code P162C GMC to trigger?

- The code is typically triggered due to a fault in the vehicle speed limiting/warning switch circuit, which may be caused by damaged wiring, a faulty switch, or a problem with the control module.

3. How serious is the OBDII code P162C GMC?

- While the code may not cause immediate harm to the vehicle, it can result in reduced performance and safety concerns due to speed limitations and warning messages.

4. Can I continue driving with the OBDII code P162C GMC active?

- It is not recommended to continue driving with the code active as it can affect the vehicle's performance and safety features.

5. How can I diagnose the OBDII code P162C GMC?

- Diagnosing the code typically involves using a scan tool to retrieve the code, inspecting the wiring and connections related to the speed limiting/warning switch, and testing the switch itself for proper functionality.

6. What are the possible repair options for OBDII code P162C GMC?

- Repair options may include repairing or replacing damaged wiring, replacing the speed limiting/warning switch, or reprogramming the control module if necessary.

7. Can I reset the OBDII code P162C GMC without fixing the underlying issue?

- While you can clear the code with a scan tool, it is important to address the root cause of the issue to prevent the code from reoccurring.

8. How much does it cost to repair OBDII code P162C GMC?

- Repair costs can vary depending on the extent of the issue, the parts needed for replacement, and labor charges. It is recommended to consult with a professional mechanic for an accurate estimate.

9. Will OBDII code P162C GMC cause my vehicle to fail an emissions test?

- The code itself may not directly cause the vehicle to fail an emissions test, but it is still recommended to address the issue promptly to ensure proper vehicle performance and compliance with regulations.

10. Can I fix the OBDII code P162C GMC myself?

- While some DIY enthusiasts may be able to diagnose and repair the issue themselves, it is recommended to seek assistance from a qualified mechanic, especially if you are not familiar with automotive electrical systems.

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