C1748 code meaning, causes and symptoms
C1748 means switch input circuit short to gnd.
C1748 code meaning is one of the most common OBD-II searches when a warning light appears on the dashboard.
Drivers searching for C1748 usually want to know what the code means, whether the car is safe to drive and what part may need testing first.
Because C1748 can appear on multiple makes and models, it is important to combine the code meaning with live data, symptoms and any other stored faults.
A proper diagnosis for C1748 should normally include a scan tool check, freeze-frame review and inspection of the components related to switch input circuit short to gnd.
Severity: Medium
Driving advice: Whether you can keep driving depends on how the vehicle is behaving. If there is rough running, loss of power, overheating or stalling, diagnose it as soon as possible.
FAQs
What does C1748 mean?
C1748 means switch input circuit short to gnd.
What can cause C1748?
Causes can include failed components, wiring faults, leaks, pressure issues, bad readings or another upstream fault affecting the same system.
Is C1748 serious?
Severity depends on how the vehicle is behaving and what system is affected. Some codes are minor, while others can affect engine performance, emissions or drivability.