B388E Chevrolet Code - Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled
Quick Answer
The Trailer Interface Control Module is supplied with battery voltage as well as ignition voltage from the rear body fuse block and is permanently grounded. Common causes include Faulty Trailer Interface Control Module, Trailer Interface Control Module harness is open or shorted, Trailer Interface Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B388E Chevrolet indicates Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled.
- Common causes
- Common causes include Faulty Trailer Interface Control Module, Trailer Interface Control Module harness is open or shorted, Trailer Interface Control Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B388E Chevrolet Description
For stop lamp operation, the Trailer Interface Control Module receives an input from the center high mount stop lamp control circuit. When the brakes are applied on the vehicle, the Trailer Interface Control Module receives the brake applied input from the center high mount stop lamp control circuit. The trailer interface control module responds by applying voltage to the trailer stop lamp control circuit illuminating the trailer stop lamps. The trailer interface control module also receives a serial data message from the BCM indicating that the vehicle brakes have been applied.
What are the Possible Causes of the DTC B388E Chevrolet?
- Faulty Trailer Interface Control Module
- Trailer Interface Control Module harness is open or shorted
- Trailer Interface Control Module circuit poor electrical connection
How to Fix the DTC B388E Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B388E Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B388E Chevrolet Code
1. What are the common symptoms of OBDII code B388E in a Chevrolet related to trailer lamps?
- Common symptoms include intermittent or total failure of trailer lamp operation, such as brake lights, turn signals, or tail lights.
2. What can cause the OBDII code B388E in a Chevrolet to trigger?
- This code is typically triggered by an excessive number of intermittent short circuit detections in the trailer lamps, indicating a possible wiring issue.
3. How can I diagnose the cause of OBDII code B388E in a Chevrolet myself?
- You can start by visually inspecting the trailer lamp wiring and connectors for any obvious signs of damage or corrosion. Using a multimeter to test continuity can also help pinpoint the issue.
4. Is it safe to continue driving my Chevrolet with the OBDII code B388E related to trailer lamps?
- It is not recommended to drive the vehicle with malfunctioning trailer lamps, as it can pose a safety hazard to you and other drivers on the road.
5. What are the repair options for fixing OBDII code B388E in a Chevrolet?
- Repair options may include repairing or replacing damaged wiring, repairing or replacing faulty connectors, or resetting the code after addressing the detected short circuit issues.
6. Can a DIY enthusiast fix the OBDII code B388E in a Chevrolet themselves?
- If you have experience with automotive electrical systems and wiring, you may be able to diagnose and repair the issue causing the code. Otherwise, it's recommended to seek professional assistance.
7. How much does it typically cost to repair OBDII code B388E in a Chevrolet at a mechanic or dealership?
- The cost of repair can vary depending on the extent of the wiring issue and whether any components need to be replaced. It's best to get a diagnostic and quote from a professional.
8. Are there any preventive measures to avoid triggering OBDII code B388E in a Chevrolet again?
- Regularly inspecting and maintaining the trailer lamp wiring, connectors, and components can help prevent issues that lead to the code being triggered again in the future.
9. Can a bad trailer lamp itself cause the OBDII code B388E in a Chevrolet to appear?
- While a faulty trailer lamp may not directly trigger this specific code, it can contribute to the overall integrity of the trailer lamp system and potentially lead to wiring issues that trigger the code.
10. How long does it typically take to repair OBDII code B388E in a Chevrolet?
- The repair time can vary depending on the complexity of the wiring issue and the accessibility of the components. It's best to consult with a professional for an accurate estimate.
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