P2771 Fault Code

Four Wheel Drive (4WD) Low Switch Circuit

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2771 fault code indicates a problem with the Four Wheel Drive (4WD) Low Switch Circuit. This circuit is responsible for signaling when the vehicle is in 4WD low range. A malfunction can prevent the system from properly engaging or disengaging, affecting vehicle performance in off-road situations.

What are the symptoms of the P2771 code?

Symptoms associated with a P2771 code may include:

• Inability to engage or disengage 4WD low range
• Dashboard warning light for 4WD
• Abnormal noises when attempting to switch to 4WD low
• Vehicle performance issues in off-road conditions

What causes the P2771 code?

Common causes of a P2771 fault code include:

• Faulty 4WD low switch
• Wiring issues, such as short circuits or damaged connections
• Defective transfer case control module
• Open circuits in the 4WD low switch circuit

How to fix P2771?

To resolve a P2771 fault code, consider the following steps:

• Inspect the 4WD low switch for proper operation and replace if faulty
• Check the wiring and connectors for damage or corrosion and repair as necessary
• Test the transfer case control module and replace if defective
• Clear the fault code and perform test drives to ensure the problem is resolved