P2771 — Four Wheel Drive (4WD) Low Switch Circuit
The 4WD-Low engagement switch circuit is faulty. The transmission and chassis controllers cannot tell whether the transfer case is in low range.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Four wd low switch
- Transfer case
- Wiring harness
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Switch contacts worn or corroded
- Broken wire to switch
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.