P0731high severityPowertrain
Gear 1 Incorrect Ratio
on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1