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P2771 2018 Chevrolet Silverado Code - Four Wheel Drive Low Switch Circuit

Quick Answer

The P2771 diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado relates to the Four Wheel Drive Low Switch Circuit. Common causes include Faulty Four Wheel Drive Low Switch, Damaged wiring or connectors in the switch circuit, Corrosion or moisture in the switch circuit. 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
P2771 2018 Chevrolet Silverado indicates Four Wheel Drive Low Switch Circuit.
Common causes
Common causes include Faulty Four Wheel Drive Low Switch, Damaged wiring or connectors in the switch circuit, Corrosion or moisture in the switch circuit.
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 17, 2024
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Code P2771 2018 Chevrolet Silverado Description

The P2771 diagnostic trouble code (DTC) in a 2018 Chevrolet Silverado relates to the Four Wheel Drive Low Switch Circuit. This code indicates that there is a malfunction in the circuit responsible for engaging the four-wheel-drive low mode in the vehicle. The four-wheel-drive low mode is essential for providing additional traction and torque in off-road or low-speed situations. When this circuit malfunctions, it can lead to the inability to engage four-wheel-drive low mode, which can affect the vehicle's performance in challenging driving conditions.

OBDII Code P2771 2018 Chevrolet Silverado - Four Wheel Drive Low Switch Circuit
P2771 2018 Chevrolet Silverado Code - Four Wheel Drive Low Switch Circuit

Common Causes of P2771 2018 Chevrolet Silverado

  1. Faulty Four Wheel Drive Low Switch
  2. Damaged wiring or connectors in the switch circuit
  3. Corrosion or moisture in the switch circuit
  4. Issues with the transfer case control module
  5. Electrical problems in the vehicle's computer system

Symptoms of P2771 2018 Chevrolet Silverado

  1. Inability to engage four-wheel-drive low mode
  2. Illumination of the four-wheel-drive warning light on the dashboard
  3. Difficulty shifting between different drive modes
  4. Reduced traction and stability in off-road or low-speed driving conditions

How to Fix P2771 2018 Chevrolet Silverado

  1. Begin by conducting a visual inspection of the Four Wheel Drive Low Switch and its wiring to check for any visible damage or corrosion.
  2. Use a multimeter to test the continuity of the switch and wiring to determine if there are any electrical faults.
  3. If necessary, replace the Four Wheel Drive Low Switch and repair or replace any damaged wiring or connectors.
  4. Clear the DTC from the vehicle's computer system using an OBD-II scanner to reset the system and retest the functionality of the four-wheel-drive low mode.
  5. If the issue persists, further diagnostics may be required to identify any underlying problems with the transfer case control module or other components.

Cost to Fix P2771 2018 Chevrolet Silverado

The typical repair costs for addressing the P2771 code in a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing the Four Wheel Drive Low Switch and repairing any damaged wiring or connectors can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops often offer lower rates. To obtain a more accurate estimate, it's advisable to contact local auto repair shops for quotes specific to your situation.

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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 P2771 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2771 in a 2018 Chevrolet Silverado?

- Common symptoms include difficulty engaging or disengaging four-wheel drive low mode, illuminated warning lights on the dashboard, and issues with the electronic four-wheel drive system.

2. What does the OBDII code P2771 in a 2018 Chevrolet Silverado indicate?

- This code indicates a problem with the Four Wheel Drive Low Switch Circuit, specifically a circuit malfunction or open/short circuit.

3. What are the possible causes of OBDII code P2771 in a 2018 Chevrolet Silverado?

- Possible causes include a faulty four-wheel drive low switch, damaged wiring or connectors in the circuit, issues with the transfer case control module, or a malfunctioning PCM.

4. How can I diagnose the cause of OBDII code P2771 in my 2018 Chevrolet Silverado?

- To diagnose this issue, you may need to perform a thorough inspection of the four-wheel drive low switch, check for damaged wiring or connectors, and use a diagnostic scan tool to retrieve stored fault codes.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P2771?

- It is not recommended to continue driving with this code present, as it may lead to further damage to the four-wheel drive system. It's best to address the issue promptly.

6. How can I repair OBDII code P2771 in my 2018 Chevrolet Silverado?

- Repair steps may include replacing the faulty four-wheel drive low switch, repairing damaged wiring or connectors, or addressing any issues with the transfer case control module or PCM.

7. Will resetting the OBDII code P2771 in my 2018 Chevrolet Silverado solve the problem?

- Simply resetting the code may temporarily clear the warning lights, but it will not fix the underlying issue causing the code. Proper diagnosis and repair are necessary.

8. Are there any DIY tips for resolving OBDII code P2771 in a 2018 Chevrolet Silverado?

- DIY enthusiasts with the necessary tools and experience can attempt to inspect and replace the four-wheel drive low switch or repair damaged wiring. However, complex issues may require professional help.

9. How long does it typically take to repair OBDII code P2771 in a 2018 Chevrolet Silverado?

- The repair time can vary depending on the exact cause of the code. Simple fixes like replacing a switch may take a short time, while diagnosing and repairing wiring issues could be more time-consuming.

10. Can a mechanic help me fix OBDII code P2771 in my 2018 Chevrolet Silverado?

- Yes, a qualified mechanic with experience in diagnosing and repairing electronic four-wheel drive systems can help identify the root cause of the code and perform the necessary repairs to resolve the issue.

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