C0388

Transfer Case High Range Switch Circuit Malfunction

Moderate severity

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.

Common causes

High range position switch failed
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $170-880
Shift actuator out of position
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $170-880
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does C0388 mean?

C0388 means "Transfer Case High Range Switch Circuit Malfunction". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0388?

high range position switch failed; shift actuator out of position — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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