Throttle Position Sensor (TPS): A faulty TPS can affect the engine's air-fuel mixture and cause the engine light to illuminate. It can also interfere with the cruise control system, preventing it from working properly and triggering the cruise control light.
EGR System Issues: Problems with the Exhaust Gas Recirculation (EGR) system, such as a stuck or malfunctioning EGR valve, can cause engine performance issues and illuminate the engine light. Additionally, it can impact the vehicle's ability to maintain a steady speed, which can affect the cruise control operation and cause the cruise control light to come on.
Faulty Cruise Control Switch: If the cruise control switch itself is defective, it could cause the cruise control light to stay on and malfunction.
Wiring Issues: Electrical problems, such as loose or damaged wiring, can affect the communication between various sensors and the engine control unit (ECU). This can lead to inaccurate readings and trigger both the engine and cruise control lights.
Computer Issues: In some cases, software glitches or hardware failures within the vehicle's computer (ECU) can cause various warning lights, including the engine and cruise control lights, to come on simultaneously.
Since diagnosing the exact cause requires testing and analysis, it's recommended to have the vehicle inspected by a qualified mechanic or take it to a trusted auto repair shop to properly identify and address the issue.
