AutoCodes – Chevrolet – P2771 2014 Chevrolet Silverado

P2771 2014 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 2014 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 536

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 2014 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 2014 Chevrolet Silverado - Four Wheel Drive Low Switch Circuit - AutoCodes.com — P2771 2014 Chevrolet Silverado Code - Four Wheel Drive Low Switch Circuit

What does this mean?

What are the Possible Causes of the DTC P2771 2014 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 2014 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 2014 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 2014 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 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2771 in a 2014 Chevrolet Silverado?

- Common symptoms include the Four Wheel Drive (4WD) system not engaging or disengaging properly, warning lights on the dashboard, and issues with shifting into 4WD Low.

2. What could cause the OBDII code P2771 in a 2014 Chevrolet Silverado?

- The most common cause of P2771 is a malfunction in the Four Wheel Drive Low Switch Circuit, which can be due to wiring issues, a faulty switch, or a problem with the transfer case control module.

3. How serious is the OBDII code P2771 in a 2014 Chevrolet Silverado?

- While the vehicle may still be driveable with this code, it is important to address it promptly to ensure the proper functioning of the 4WD system, especially in off-road or low-traction situations.

4. Can I continue driving my 2014 Chevrolet Silverado with the OBDII code P2771?

- It is not recommended to ignore P2771, as it can lead to potential issues with the 4WD system. It is best to have the problem diagnosed and repaired as soon as possible.

5. How can I diagnose the OBDII code P2771 in my 2014 Chevrolet Silverado?

- Diagnosing P2771 typically involves using a scan tool to retrieve the code, checking the wiring and connections related to the Four Wheel Drive Low Switch Circuit, and testing the switch and transfer case control module.

6. What are some repair tips for fixing the OBDII code P2771 in a 2014 Chevrolet Silverado?

- Repair tips may include inspecting and repairing any damaged wiring, replacing a faulty switch or transfer case control module, and ensuring all connections are secure and free of corrosion.

7. Can weather or driving conditions affect the occurrence of OBDII code P2771 in a 2014 Chevrolet Silverado?

- Extreme weather or off-road driving conditions can potentially exacerbate issues with the 4WD system, leading to the triggering of P2771. Regular maintenance and inspections can help prevent such occurrences.

8. Is it possible to reset the OBDII code P2771 in a 2014 Chevrolet Silverado without repairing the issue?

- While clearing the code may temporarily turn off the warning lights, the underlying problem causing P2771 will persist. It is crucial to fix the root cause of the issue to prevent further damage.

9. Are there any recalls or technical service bulletins related to OBDII code P2771 in a 2014 Chevrolet Silverado?

- It is advisable to check with the manufacturer or a certified dealership for any recalls or technical service bulletins related to P2771 in your specific vehicle model and year.

10. How much does it typically cost to repair the OBDII code P2771 in a 2014 Chevrolet Silverado?

- The cost of repairing P2771 can vary depending on the root cause of the issue, the extent of repairs needed, and labor costs. It is recommended to obtain estimates from reputable mechanics or dealerships.