P2774 Fault Code

Four Wheel Drive (4WD) Low Switch Circuit High

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

The P2774 fault code indicates an issue with the Four Wheel Drive (4WD) Low Switch Circuit being sensed at a high voltage. This usually means that the vehicle's control module is detecting an anomaly in the electrical signal from the 4WD Low switch, which is responsible for indicating when the vehicle is in low-range 4WD mode.

What are the symptoms of the P2774 code?

Symptoms may vary, but common signs include:

• Warning lights on the dashboard indicating 4WD issues.
• Inability to engage or disengage 4WD low.
• Poor performance when attempting to drive in 4WD mode.
• Possible activation of the vehicle stability control or traction control systems.

What causes the P2774 code?

Potential causes for this fault code include:

• A faulty 4WD Low switch that is stuck or malfunctioning.
• Wiring issues such as frayed or short-circuited cables.
• Corrosion or poor connections in the wiring harness.
• A malfunctioning 4WD control module that misreads the input from the switch.

How to fix P2774?

To address the P2774 fault code, consider the following steps:

• Inspect the 4WD Low switch for proper function and replace it if defective.
• Check and repair any damaged wiring or connectors associated with the 4WD Low switch circuit.
• Clear the fault code from the vehicle’s computer and test the system to ensure the issue does not return.
• If necessary, reprogram or replace the 4WD control module if it is found to be faulty.