B388E
Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled
B388E is an OBD-II diagnostic trouble code meaning: Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled. Common causes: damaged trailer wiring harness, short circuit in the headlight circuit. Estimated repair cost: $11–56.
Symptoms
- Flashing or non-functioning trailer lights
- Dashboard warning
- Incorrect operation of the trailer lighting system
Causes
- Damaged trailer wiring harness
- Short circuit in the headlight circuit
- Oxidized or bad contacts in connectors
- Faulty trailer control unit (if installed)
How to Fix
- Check trailer wiring harness for damage
- Inspect the connectors and clean the contacts
- Check trailer lights for faults
- Test the circuit with a multimeter for short circuit
- If necessary, replace damaged wires or connectors
Related codes
Error B388E by Vehicle Brand
FAQ
What does the B388E code mean?
B388E is an OBD-II diagnostic trouble code that indicates: Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled
What causes a B388E error code?
The most common causes of B388E include: Damaged trailer wiring harness; Short circuit in the headlight circuit; Oxidized or bad contacts in connectors; Faulty trailer control unit (if installed).
How do I fix a B388E diagnostic trouble code?
To fix B388E: Check trailer wiring harness for damage. Inspect the connectors and clean the contacts. Check trailer lights for faults. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B388E?
Limited driving only, diagnose soon
How much does it cost to fix B388E?
The estimated repair cost for B388E is $11–56. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat