C1438 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1438 – Transfer Case Differential Clutch Worn
C1438 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1438 Possible Causes
Worn Transfer Case Differential Clutch,Faulty Transfer Case Assembly,Faulty Final Drive Control Module (FDCM)
The Final Drive Control Module (FDCM) is unable to fully lock the T-Case (in Either High or Low) because the T-Case clutch is worn.