DTC P0734 Acura
Problem in 4th Clutch and 4th Clutch Hydraulic Circuit (4th gear incorrect ratio)
Problem in 4th Clutch and 4th Clutch Hydraulic Circuit (4th gear incorrect ratio)
Description
The Powertrain Control Module (PCM) computes the ratio of the input shaft (mainshaft) speed to the output shaft (countershaft) speed. When the ratio is not the 4th gear ratio, it is detected as a malfunction of the hydraulic circuit or the 4th clutch. The actual gear ratio must match one of these conditions for at least 12 seconds with the 4th gear command. Actual gear ratio is greater than the 4th gear ratio by a factor of 1.2. Actual gear ratio is less than the 4th gear ratio by a factor of 0.75. NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot.
Cause and Solution
Low or dirty transmission fluid
Faulty shift valves A, B, C, and D are stuck
Faulty ATF pump and the regulator valve
Inspect the strainer for metal debris or excessive clutch material, if present
Video Guide
Diagnostic Info
- DTC Code: P0734
- Brand: Acura