AutoCodes – Generic – B1252

B1252 Code - USB Port Circuit Short to Ground

Quick Answer

The media hub requires an external power and ground circuit to operate. Common causes include Faulty USB Cable and Port, USB Cable and Port harness is open or shorted, USB Cable and Port circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1252 indicates USB Port Circuit Short to Ground.
Common causes: Common causes include Faulty USB Cable and Port, USB Cable and Port harness is open or shorted, USB Cable and Port circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 16,605

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Basic DIY (1 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1252 Description

The media hub requires an external power and ground circuit to operate. Loss of power or ground disables all media hub functionality. One USB cable connects the media hub to the Accessory Protocol Interface Module (APIM). The OBDII code sets when the APIM detects an over-current condition in the USB circuit. This can be caused by a fault in the USB cable and port, or by the customer USB device.

OBDII Code B1252 - USB Port Circuit Short to Ground - AutoCodes.com — B1252 Code - USB Port Circuit Short to Ground

What does this mean?

What are the Possible Causes of the DTC B1252?

Faulty USB Cable and Port
USB Cable and Port harness is open or shorted
USB Cable and Port circuit poor electrical connection
Faulty Accessory Protocol Interface Module (APIM)

How to Fix the DTC B1252?

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 B1252 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.

Need more information about the B1252 code?

Need more information on how to fix the B1252 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1252 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1252 Acura — Combination Switch Control Unit Internal Error
B1252 Ford — USB Port Circuit Short to Ground
B1252 Honda — Combination Switch Control Unit Internal Error
B1252 Lincoln — USB Port Circuit Short to Ground
B1252 Mercury — USB Port Circuit Short to Ground

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1252 Code

1. What are the common symptoms of OBDII code B1252 (USB Port Circuit Short to Ground)?

The common symptoms include a malfunctioning USB port in the vehicle, inability to connect devices, and potential issues with the vehicle's entertainment system.

2. What are the possible causes of OBDII code B1252?

Possible causes of this code include a short circuit in the wiring, a faulty USB port, water damage, or a loose connection in the USB port circuit.

3. How can I diagnose the USB Port Circuit Short to Ground issue?

Diagnosing this issue involves visually inspecting the USB port and related wiring for any visible damage, using a multimeter to test for continuity and shorts, and checking the connections for proper grounding.

4. Can I repair OBDII code B1252 myself?

If you have experience working with automotive electrical systems, you may be able to repair this issue by fixing the short circuit, repairing or replacing damaged wiring, or replacing the faulty USB port.

5. Is it safe to continue driving with OBDII code B1252 present?

While the vehicle may still be operable with this code, it is recommended to address the issue promptly to prevent any further damage to the vehicle's electrical system.

6. Will clearing the OBDII code B1252 make the problem go away?

Clearing the code may temporarily remove the warning light, but if the underlying issue is not fixed, the code is likely to reappear once the problem is detected again.

7. Can a damaged USB device cause OBDII code B1252 to trigger?

Yes, a damaged USB device or cable connected to the USB port can potentially cause a short circuit and trigger the B1252 code.

8. Are there any preventive measures to avoid OBDII code B1252 in the future?

To prevent this issue, avoid using damaged USB devices or cables, ensure proper installation of any aftermarket electronics, and periodically inspect the USB port and wiring for any signs of wear or damage.

9. How long does it typically take to repair OBDII code B1252?

The repair time can vary depending on the extent of the damage and the expertise of the person performing the repair. It can range from a quick fix to a more involved repair requiring professional assistance.

10. Can OBDII code B1252 affect other systems in the vehicle?

While the code specifically relates to the USB port circuit, an underlying electrical issue could potentially impact other systems in the vehicle, so it's important to address the problem promptly to avoid further complications.