honda airwave blinking d-light and not engaging forward gear
HONDA

If frame “D” blinks on the dashboard while driving, stop, turn off the engine and start it again. If after that, the frame around “D” stops blinking, then this is an accident! BUT, it’s still better to replace the 3rd gear automatic transmission oil pressure sensor with a new sensor

The frame around the “D” indicator continues to blink.

To begin with, you should inspect/check the suitable wiring for them; inspect the plastic ends of the solenoids on which the chips are put on (they may have been broken).

If the automatic transmission feels good, the fluid level in the automatic transmission is normal, the “Check Engine” indicator is off, then, most likely, the sensor of the 3rd (third) gear of the automatic transmission is floundering.