Code result
P2774
Four Wheel Drive (4WD) Low Switch Circuit High
High severity
What it means
Voltage on the 4WD-Low switch line is above the expected window. Usually an open switch or a short to battery.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Open switch contacts
highOne of the most commonly reported causes for this code — check this first.
Switch wire shorted to B+
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P2774 freeNo credit card required