C0388Transfer Case High Range Switch Circuit Malfunction
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- No public source can be found for C0388; neither the reachable J2012 tables nor GM's PIP5094 or NHTSA's index of bulletins contain it. The text therefore covers only the title part. A transfer case reports its engaged range to the control module through a switch or position sensor; the high range is the normal road gear. Makers that document this file it under their own numbers. GM checks circuits 7477 to 7479 between gear position sensor B2227 and the module when C0398 repeats on 2014–15 trucks. Since a 2014 calibration the GM module also compares the stored shift shaft position at shutdown with the value at start and, beyond 5 degrees of drift, holds 4HI. Nissan replaced the transfer case range sensor on 2023 Frontier and Titan in campaign PC984.
- What you may notice
- Service 4WD or 4x4 warning displayed
- Range indicator does not match the selected gear
- Shifts out of high range refused
- Likely causes
- LikelyOpen, shorted or corroded wire or terminal of the range switch
- PossibleRange switch or position sensor on the transfer case defective
- RareTransfer case module calibration needing an update
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.