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C1748: Switch input Circuit Short to Gnd

OTHER
System
Manufacturer-Specific Chassis
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does C1748 Mean?

C1748 is a manufacturer-specific diagnostic trouble code: Switch input Circuit Short to Gnd. This code applies to OTHER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of C1748

Frequently Asked Questions

What does C1748 mean?
Switch input Circuit Short to Gnd. This is a manufacturer-specific code for OTHER vehicles.
Which vehicles get code C1748?
This code appears primarily in OTHER vehicles. Check your owner's manual or a dealer for model-specific information.
Can I fix this myself?
Manufacturer-specific codes often require a brand-specific diagnostic scanner for full data. A dealer or specialist with the right tools will diagnose it most accurately.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

C1700 Left Rear Sensor Circuit Failure C1701 Left Rear Sensor Circuit Fault C1702 RightRear Sensor Circuit Short to Vbat C1703 Right Rear Sensor Circuit Failure C1704 Right Rear Sensor Circuit Fault C1705 Left Rear Center Sensor Circuit Short to Vbat C1706 Left Rear Center Sensor Circuit Failure C1707 Left Rear Center Sensor Circuit Fault C1708 Right Rear Center Sensor Circuit Short to Vbat C1709 Right Rear Center Sensor Circuit Failure