Here's why:
* 1991 Mirages don't have electronic transmissions: The transmission is likely a manual or a simple automatic without a complex electronic control system.
* ECUs are designed to store error codes: They don't typically "forget" how to control the engine. Resetting the ECU might clear temporary codes, but it won't fix a mechanical issue.
Instead of focusing on resetting the ECU, here's a more helpful troubleshooting approach:
1. Check the transmission fluid: Make sure the fluid level is correct and the fluid itself is clean and not burnt.
2. Inspect the transmission linkage: Look for any loose, broken, or misadjusted cables or rods connecting the shifter to the transmission.
3. Check for any external damage: Look for leaks, cracks, or damage to the transmission housing or other components.
4. Verify the transmission's operation: Start the car and attempt to shift through all gears. Listen for any unusual noises or clunking sounds.
5. Have a mechanic diagnose the problem: If you can't identify the issue, a qualified mechanic can inspect the transmission and determine the cause of the shifting problem.
Remember: Resetting the ECU is not a common solution for transmission problems. Focus on checking the transmission itself and its related components.
