Some 2000-2002 Hyundai Accents with 1.5L SOHC and 1.6L DOHC engines may experience the following symptoms in hot and humid weather:

Some 2002 1.6L Accents may turn on the Check Engine light and store diagnostic trouble code P0116 (Engine Coolant Temperature Sensor Range/ Performance Problem) in the ECM. This code can be falsely set under certain driving conditions. Check the Engine Coolant Temperature (ECT) sensor to make sure that it's functioning properly. When the engine is cold soaked, the ECT and intake air temperature should read approximately the same temperature. When the engine is fully warmed-up, the ECT should read about 190° F to 200° F (depending on the cooling fan cycle). If the code has been set falsely, perform the ECM software reprogramming procedure using the Hi-Scan Pro as outlined below.

The ECM program has been revised to improve both of the above described conditions.

Cautions Before Reprogramming:

Warning: If reprogramming is interrupted, the manual update procedure must be used.