1. Low ATF (Automatic Transmission Fluid) level: The S3 light may flash if the automatic transmission fluid level is low. Check the ATF level using the transmission fluid dipstick and add more fluid if necessary.
2. Dirty or clogged ATF filter: A dirty or clogged ATF filter can restrict the flow of fluid to the transmission, causing the S3 light to flash. Replace the ATF filter if it is dirty or clogged.
3. Faulty ATF pressure switch: The ATF pressure switch sends a signal to the Engine Control Unit (ECU) to indicate the pressure of the ATF. If the ATF pressure switch is faulty, it may send an incorrect signal to the ECU, causing the S3 light to flash. Replace the ATF pressure switch if it is faulty.
4. Faulty transmission solenoid: The transmission solenoid controls the flow of ATF to the different gears. If a transmission solenoid is faulty, it may not be able to properly control the flow of ATF, causing the S3 light to flash. Replace the faulty transmission solenoid if necessary.
5. Internal transmission problems: If the above problems have been ruled out, the S3 light may be flashing due to internal transmission problems. This could include problems with the gears, bearings, or other internal components of the transmission. If you suspect that there may be internal transmission problems, it is best to have the transmission inspected by a qualified mechanic.
