1. Check the transmission fluid level. If the transmission fluid is low, it can cause the transmission to slip, which can trigger the P0730 code. Make sure the fluid level is full and that the fluid is clean and red.
2. Inspect the transmission fluid filter. If the transmission fluid filter is clogged, it can restrict the flow of fluid to the transmission, which can also cause it to slip. Remove the filter and inspect it for debris. If it is clogged, replace it.
3. Check the transmission linkage. If the transmission linkage is loose or damaged, it can cause the transmission to shift improperly, which can also trigger the P0730 code. Inspect the linkage for any signs of damage or looseness. If you find any problems, tighten the linkage or replace it.
4. Have the transmission computer scanned. If you have tried all of the above and you are still getting the P0730 code, you may need to have the transmission computer scanned for codes. This can be done by a qualified mechanic or at a dealership.
If the transmission computer scan reveals any problems, you may need to have the transmission repaired or replaced.
