Incorrect Gear Ratio
2004-2016 Aston Martin DB9 6.0L V12
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
Aston Martin DB11
2016-2024 4.0L V8 Twin Turbo
Aston Martin DB11
2016-2024 5.2L V12 Twin Turbo
Aston Martin DB7
1994-2003 3.2L I6 Supercharged
Aston Martin DBS Superleggera
2019-2024 5.2L V12 Twin Turbo
Aston Martin DBX
2020-2024 4.0L V8 Twin Turbo
Aston Martin Vantage
2005-2024 4.7L V8
Aston Martin Vantage
2018-2024 4.0L V8 Twin Turbo
Common Questions
What does code P0730 mean on a 2004-2016 Aston Martin DB9?
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 Aston Martin DB9?
Common symptoms of P0730 include: Check Engine Light, Transmission slipping, Harsh shifting, Flare on shifts, Limp mode.
What causes P0730 on a 2004-2016 Aston Martin DB9?
Common causes of P0730 include: Worn clutch packs, Low fluid level, Faulty shift solenoid, Internal transmission failure, Torque converter issue.