P0731
Gear 1 Incorrect Ratio
1992-1996 BMW 318is E36 1.8L I4 🇦🇺
High SeverityPowertrain
Description
Incorrect gear ratio detected in 1st gear.
Symptoms
- Slipping in 1st gear
- Harsh 1-2 shift
- No 1st gear
Common Causes
- 1st gear clutch pack worn
- Shift solenoid issue
- Valve body problem
- Low line pressure
Diagnostic Steps
- Check fluid
- Test shift solenoids
- Monitor gear ratio in 1st
- Check line pressure
Repair Notes
Internal transmission service may be needed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0731 on Other Vehicles
Common Questions
What does code P0731 mean on a 1992-1996 BMW 318is E36?
P0731 stands for "Gear 1 Incorrect Ratio". Incorrect gear ratio detected in 1st gear.
What are the symptoms of P0731 on a BMW 318is E36?
Common symptoms of P0731 include: Slipping in 1st gear, Harsh 1-2 shift, No 1st gear.
What causes P0731 on a 1992-1996 BMW 318is E36?
Common causes of P0731 include: 1st gear clutch pack worn, Shift solenoid issue, Valve body problem, Low line pressure.