The P0731 code occurs when the PCM detects a discrepancy between the speeds of first gear’s input RPM sensor and transmission output RPM sensor. As a result, the vehicle cannot shift into first gear, and it could indicate that the transmission is slipping.
What does P0731 mean?
Code P0731 When the code P0731 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is seeing greater than a specified RPM difference between the rotational speed of the Input RPM Sensor and the Transmission Output RPM Sensor in Gear 1.
What causes P0731?
When the powertrain control module (PCM) detects that the RPM difference between the rotational speed of the two sensors in Gear 1 falls outside the normal range, the P0731 code is set.
How do I fix code P0731?
What repairs can fix the P0731 code?
- Adding more transmission fluid or changing the transmission fluid.
- Replacing a defective shift solenoid.
- Replacing or reprogramming a defective TCM.
- Replacing wiring and/or connectors for a damaged transmission control circuit.
How do you fix gear ratio problems?
Inspect electrical connections and wires connecting sensors to the transmission control module. Repair or replace any damaged wires in and around the transmission control module. Repair or replace any damaged wires in and around transmission speed sensor.
Can you check transmission fluid?
Pull out the dipstick, wipe it clean, replace it slowly, and then pull it back out. Check the fluid level—how high the fluid comes up on the dipstick—against the “full” and “low” or “fill” marks on the dipstick. The color of transmission fluid can tell you a lot about the health of your car’s transmission.
What does a transmission control module do?
What is a Transmission Control Module? The transmission control module is an electronic component of your transmission that’s in charge of interpreting electrical signals from sensors in other parts of the vehicle.
How is P0171 diagnosed?
How does a mechanic diagnose the P0171 code?
- Assuming that no other trouble codes exist, a mechanic may diagnose the P0171 code by checking the engine for vacuum leaks with a vacuum gauge. …
- The fuel pressure sensor and MAF sensor (mass air flow) will also be checked with a fuel pressure gauge.
Can a clogged transmission filter cause shifting problems?
3. Shifting Issues. When the transmission fluid isn’t clean or is blocked by a clogged filter, the internal components won’t have the lubrication they require to function properly. This could lead to shifting issues, grinding gears, slipping transmission or other common symptoms of transmission problems.
How do you know if your transmission is failing?
Grinding, Jerking, or Shaking
Shaking and jerking are good indicators of transmission trouble. Gear grinding is a common symptom in manual transmission vehicles. Automatic transmission failure often begins with some hesitation during gears shifting. Some might describe this a “slipping,” as well.