AutoCodes – Chevrolet – P2771 2016 Chevrolet Silverado

P2771 2016 Chevrolet Silverado Code - Four Wheel Drive Low Switch Circuit

Quick Answer

For vehicles equipped with an active transfer case, the four-wheel drive (4WD) low circuit consists of the Powertrain Control Module (PCM), a transfer case control module, and the circuit wiring. Common causes include Faulty Transfer Case Shift Control Switch, Transfer Case Shift Control Switch harness is open or shorted, Transfer Case Shift Control 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: P2771 2016 Chevrolet Silverado indicates Four Wheel Drive Low Switch Circuit.
Common causes: Common causes include Faulty Transfer Case Shift Control Switch, Transfer Case Shift Control Switch harness is open or shorted, Transfer Case Shift Control 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 403

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 22, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2771 2016 Chevrolet Silverado Description

For vehicles equipped with an active transfer case, the four-wheel drive (4WD) low circuit consists of the Powertrain Control Module (PCM), a transfer case control module, and the circuit wiring. The transfer case control module controls the 4WD low signal on the low signal circuit. When the operator selects 4WD low, the transfer case control module grounds the signal circuit, and the 4WD low signal voltage on the circuit changes from ignition voltage to zero volts. The PCM then compensates for transfer case gear reduction in the transmission output shaft speed (OSS) sensor signal. The PCM uses the transmission OSS sensor signal to adjust shift points, line pressure, and torque converter clutch (TCC) scheduling.
For vehicles not equipped with an active transfer case, the 4WD low circuit consists of the PCM, a transfer case switch, and the circuit wiring. The transfer case switch controls the 4WD low signal on the signal circuit. When the operator selects 4WD low, the transfer case switch closes, and the 4WD low signal voltage on the signal circuit changes from ignition voltage to zero volts. The PCM then compensates for transfer case gear reduction in the transmission output shaft speed (OSS) sensor signal. The PCM uses the transmission OSS sensor signal to adjust shift points, line pressure, and TCC scheduling.

OBDII Code P2771 2016 Chevrolet Silverado - Four Wheel Drive Low Switch Circuit - AutoCodes.com — P2771 2016 Chevrolet Silverado Code - Four Wheel Drive Low Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P2771 2016 Chevrolet Silverado?

Faulty Transfer Case Shift Control Switch
Transfer Case Shift Control Switch harness is open or shorted
Transfer Case Shift Control Switch circuit poor electrical connection

How to Fix the DTC P2771 2016 Chevrolet Silverado?

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 P2771 2016 Chevrolet Silverado 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.

Need more information about the P2771 2016 Chevrolet Silverado code?

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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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2771 in a 2016 Chevrolet Silverado?

The common symptoms of code P2771 include difficulty shifting into four-wheel drive low mode, illuminated warning lights on the dashboard, and potential loss of functionality in the four-wheel drive system.

2. What does the OBDII code P2771 in a 2016 Chevrolet Silverado indicate?

Code P2771 indicates a malfunction in the Four Wheel Drive Low Switch Circuit of the vehicle.

3. What are some possible causes of OBDII code P2771 in a 2016 Chevrolet Silverado?

Possible causes of code P2771 include a faulty four-wheel drive low switch, damaged wiring or connectors in the circuit, or issues with the transfer case control module.

4. How can I diagnose the OBDII code P2771 in my 2016 Chevrolet Silverado?

Diagnosing code P2771 typically involves using an OBDII scanner to retrieve the fault code, inspecting the wiring and connectors related to the four-wheel drive low switch, and testing the switch itself for proper functionality.

5. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P2771?

It is not recommended to continue driving the vehicle with code P2771 present, as it can lead to further damage to the four-wheel drive system and potentially compromise vehicle safety.

6. How can I repair OBDII code P2771 in my 2016 Chevrolet Silverado?

Repairing code P2771 may involve replacing the faulty four-wheel drive low switch, repairing damaged wiring or connectors, or reprogramming the transfer case control module to address the issue.

7. Is it possible to reset OBDII code P2771 in a 2016 Chevrolet Silverado without fixing the underlying issue?

Resetting the code without addressing the underlying issue will only temporarily clear the fault code, and the problem is likely to reoccur. It is essential to diagnose and repair the root cause of the code.

8. Can extreme weather conditions trigger OBDII code P2771 in a 2016 Chevrolet Silverado?

Extreme weather conditions, such as water intrusion or exposure to extreme temperatures, can potentially cause issues with the four-wheel drive low switch circuit, leading to the activation of code P2771.

9. How long does it typically take to repair OBDII code P2771 in a 2016 Chevrolet Silverado?

The repair time for code P2771 can vary depending on the specific cause of the issue. Simple fixes like replacing a faulty switch may take a few hours, while more complex wiring or module repairs could take longer.

10. Should I seek professional assistance to repair OBDII code P2771 in my 2016 Chevrolet Silverado?

Due to the complexity of diagnosing and repairing issues related to the four-wheel drive system and electrical circuits, it is advisable to seek the help of a qualified mechanic or dealership to address OBDII code P2771 in your Chevrolet Silverado.