What does it mean when the d4 light and park stay on your 1992 Honda Accord lx dies?

When the D4 light and the Park light stay on together on your 1992 Honda Accord LX, it indicates a problem with the transmission range sensor or the transmission control unit (TCU). The transmission range sensor is a switch located on the transmission that detects the position of the gear shift lever. When the gear shift lever is in the Park or Drive position, the transmission range sensor sends a signal to the TCU. The TCU then activates the corresponding light on the instrument panel.

If the transmission range sensor is faulty, the TCU may not receive the correct signal, causing the D4 and Park lights to stay on together. This can also cause the transmission to shift into the wrong gear or not shift at all. In some cases, the transmission may even go into limp mode, which is a reduced power mode that limits the vehicle's speed.

If you notice the D4 and Park lights staying on together on your Honda Accord, you should have the vehicle inspected by a qualified mechanic. The mechanic can diagnose the problem and perform the necessary repairs.