Check Engine Light

The IFI control module is equipped with Diagnostic Trouble Code (DTC) memory. During vehicle operation, signal plausibility is checked on all input and output connections. If a malfunction occurs for an extended period of time (5 seconds), a DTC is stored in memory of IFI control module. If a malfunction occurs in boost pressure, EGR system, etc., malfunction is stored after 5-10 seconds. DTC memory remains active if ignition is turned off or vehicle's battery is disconnected. If an emissions related malfunction occurs, the CHECK ENGINE light may illuminate and/or the multifunction indicator may display CHECK ENGINE/ENGINE ELECTRONICS.