P0730
Incorrect Gear Ratio
2006-2011 BMW 325i 3.0L I6 N52 🇷🇺
High SeverityPowertrain
Description
The PCM detected that the actual gear ratio does not match the expected ratio for the commanded gear.
Symptoms
- Check Engine Light
- Transmission slipping
- Harsh shifting
- Flare on shifts
- Limp mode
Common Causes
- Worn clutch packs
- Low fluid level
- Faulty shift solenoid
- Internal transmission failure
- Torque converter issue
Diagnostic Steps
- Check fluid level and condition
- Monitor gear ratio data with scan tool
- Check for other transmission codes
- Test shift solenoids
- May need internal transmission inspection
Repair Notes
Often indicates internal transmission wear. Start with fluid check and solenoid testing.
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
P0730 on Other Vehicles
Common Questions
What does code P0730 mean on a 2006-2011 BMW 325i?
P0730 stands for "Incorrect Gear Ratio". The PCM detected that the actual gear ratio does not match the expected ratio for the commanded gear.
What are the symptoms of P0730 on a BMW 325i?
Common symptoms of P0730 include: Check Engine Light, Transmission slipping, Harsh shifting, Flare on shifts, Limp mode.
What causes P0730 on a 2006-2011 BMW 325i?
Common causes of P0730 include: Worn clutch packs, Low fluid level, Faulty shift solenoid, Internal transmission failure, Torque converter issue.