Ford Fiesta check engine light and wrench symbol issue with throttle body and accelerator position sensor replacement on Ford Fiesta

Some Ford Fiesta owners report experiencing issues related to the check engine light and wrench symbol, particularly involving the throttle body and accelerator position sensor. Common symptoms include dirt buildup on the throttle body, erratic idling, and the illumination of the check engine light. Additionally, the wrench light can be triggered by various problems such as battery issues, faulty wiring, or transmission troubles. Some owners also report engine misfires caused by faulty spark plugs, ignition coils, or fuel injectors, which can further activate the wrench symbol. A malfunctioning throttle position sensor may send incorrect data to the Powertrain Control Module, leading to improper engine operation. It is crucial for owners to accurately diagnose the specific issue before replacing components, and thorough diagnostics should be performed to identify the root cause. If uncertain about the diagnosis or repairs, seeking assistance from a qualified mechanic with experience in Ford vehicles is recommended.