Chassis, generic

C0376 Front Axle Disconnect

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0376 is not in the published J2012 lists. The number exists at GM, whose bulletin PIP5094 lists it next to transfer case codes such as C0374 and C0387, but no reachable GM document states what it means. The title part decouples the front axle so the front driveline stands still in two-wheel drive. GM handles the front axle actuator of 2007–13 Silverado, Sierra, Tahoe and Yukon under C0379 and blames moisture at the actuator plug. FCA stores such faults as C1463 or C147B: on the 2018 Wrangler the drivetrain module sets C147B-14 when the lock signal of the disconnect stays under 1.19 V for over 500 ms and then leaves the actuator where it is; for Ram 3500/4500 it advises checking the harness 6–8 inches from the plug. If the disconnect fails, 4WD may not engage or release.

Likely causes

Water or corrosion in the axle actuator connector
Chafed actuator harness near the axle
Disconnect actuator or its position switch defective

Symptoms

  • Service 4WD message or flashing 4WD indicator
  • Front wheels not driven although 4WD is selected
  • Grinding or clicking from the front axle when shifting

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

front axle disconnect actuatortransfer case control moduleaxle position switch

Related codes

C0374C0387C0306

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.