Error code
OBD2 P0730
OBD2P0730
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Incorrect Gear Ratio.
Severity
moderateCan drive, but shifting issues may worsen over time.
Summary
P0730 indicates an incorrect gear ratio in the transmission, specifically during deceleration in low gear mode when there is no engine braking within the transmission.
Symptoms
- Malfunction Indicator Lamp (MIL) lights on
- Transmission shifting problems
Common Causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids malfunction
- Transmission mechanical issues
- Transmission hydraulic control circuit faults
Fixes
FAQ
What does P0730 mean?
P0730 indicates an incorrect gear ratio in the transmission, often due to issues with fluid level or mechanical components.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0700Transmission Control System (MIL Request)
- P0701Transmission Control System Range/Performance
- P0702Transmission Control System Electrical
- P0703Brake Switch 'B' Circuit
- P0704Clutch Switch Input Circuit Malfunction
- P0705Transmission Range Sensor Circuit Malfunction (PRNDL Input)
- P0706Transmission Range Sensor Circuit Range/Performance
- P0707Transmission Range Sensor Circuit Low
- P0708Transmission Range Sensor Circuit High
- P0709Transmission Range Sensor Circuit Intermittent
- P0710Transmission Fluid Temperature Sensor 'A' Circuit
- P0711Transmission Fluid Temperature Sensor 'A' Circuit Range/Performance