Pinpoint Test O: P0731
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
The PCM monitors clutch applications for all gears. It sets a DTC if it detects a ratio error but is unable to detect which clutch caused the issue. The transmission logic disables the gear in question. If multiple incorrect gear ratio diagnostic trouble codes (DTCs) are set, look for a common clutch involved in the operation of those gear applications. If no common clutch errors are found, look for a line pressure or pump pressure concern.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition PCM P0731:00 Gear 1 Incorrect Ratio: No Sub Type Information This DTC indicates a gear ratio error either in or while shifting to 1st gear. The fault did not last long enough to set a more specific DTC. The failsafe logic disables 1st gear for the remainder of the key cycle during which the fault occurred. Possible Sources
- Transmission fluid contamination
- Low line pressure
- A clutch stuck off or slipping
- D clutch stuck off or slipping
- E clutch stuck off or slipping
- Low one-way clutch slipping or damaged
- O1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DTC (DIAGNOSTIC TROUBLE CODE) P0731
- Ignition ON.
- Using a diagnostic scan tool, clear all diagnostic trouble codes (DTCs) from the PCM.
- Road test the vehicle.
- Using a diagnostic scan tool, retrieve all continuous memory diagnostic trouble codes (CMDTCs) from the PCM.
Is DTC P0731 present in the PCM?
Yes Check the A clutch for a does not apply or a slipping condition. REFER to: A Clutch . Check the D clutch for a does not apply or a slipping condition. REFER to: D Clutch . Check the E clutch for a does not apply or a slipping. REFER to: E Clutch . Check the low one-way clutch for a slipping condition. REFER to: Low One-Way Clutch Assembly . No The fault is not present at this time and may be intermittent.