P2773 Fault Code

Four Wheel Drive (4WD) Low Switch Circuit Low

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

The P2773 fault code indicates an issue with the four-wheel drive (4WD) low switch circuit. This switch is critical for the proper functioning of the 4WD system, as it signals the transfer case when to engage or disengage the low range. If the circuit is experiencing low voltage or an open state, the vehicle may fail to switch into 4WD low mode, impairing its off-road capabilities and traction on difficult terrains.

What are the symptoms of the P2773 code?

Symptoms associated with the P2773 code may include:

• Inability to engage 4WD low mode, leading to poor traction in off-road scenarios
• Dashboard warning lights indicating a 4WD fault
• Irregular operation of the 4WD system or unexpected switching between modes
• Unusual noises from the transfer case while attempting to engage 4WD low.

What causes the P2773 code?

Common causes of the P2773 code can include:

• Faulty 4WD low switch
• Damaged wiring or connectors within the switch circuit
• Issues with the transfer case control module
• Corroded or loose connections that can disrupt signal transmission
• Problems in the vehicle's four-wheel drive system that prevent activation.

How to fix P2773?

To resolve the P2773 fault code, you can follow these steps:

• Inspect the 4WD low switch for signs of wear, damage, or malfunction and replace it if necessary.
• Check the wiring and connectors associated with the low switch circuit for frays, breaks, corrosion, or loose connections.
• Use a multimeter to test the voltage at the switch to verify that it is receiving the proper voltage.
• If the wiring and switch are in good condition, the issue may be with the transfer case control module, which might need to be diagnosed or replaced if faulty.
• After repairs, clear the fault code and test the system to ensure proper operation.