C0388: Transfer Case High Range Switch Circuit Malfunction
Standardized SAE J2012 code · C03xx codes
Safety-critical system. Faults in airbags, brakes, steering or high-voltage components can put people at risk. Follow the manufacturer's service information and safety procedures, or have the vehicle checked by a qualified workshop.
What does C0388 mean?
The transfer case control module has detected an implausible state from the high range (4H) position switch. Range selection in 4WD mode may be limited.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
- High High range position switch failed
- Medium Shift actuator out of position
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of C0388 on the same make and model first.
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