P124F 2017 Chevrolet Silverado Code - Cylinder 8 Injector High Control Circuit Shorted to Control Circuit

P124F indicates that the Cylinder 8 Injector High Control Circuit is shorted to the control circuit, meaning there’s an electrical issue affecting the injector's operation.

Common symptoms include rough idling, misfires, reduced engine performance, poor fuel economy, and an illuminated check engine light.

The most common causes are damaged wiring, a faulty fuel injector, a defective injector driver, or corrosion in the electrical connectors.

Driving with this code is not recommended as it can lead to further engine damage, reduced performance, and poor fuel efficiency.

Start by inspecting the wiring and connectors for Cylinder 8 injector, checking for shorts, corrosion, or damage. Use a multimeter to test circuit continuity and the injector's resistance.

Repairs may include replacing damaged wiring, cleaning or replacing corroded connectors, or replacing the Cylinder 8 fuel injector if it's determined to be faulty.

Repair costs vary, but replacing a fuel injector can range from $150 to $400, while fixing wiring or connectors may cost less depending on the extent of the damage.

While rare, a faulty Engine Control Module (ECM) could cause this code if it’s failing to properly control the injector circuit.

Regularly inspect and maintain the injector wiring and connectors, address corrosion issues promptly, and use high-quality fuel to prevent injector clogging or damage.

Simply clearing the code will not fix the underlying problem. The root cause, such as a wiring issue or faulty injector, must be addressed to resolve the code permanently.