P0730
High SeverityIncorrect Gear Ratio
Transmission System
What Does P0730 Mean?
The TCM detects that the actual gear ratio does not match the commanded gear.
Common Fix
Transmission fluid service or rebuild
Estimated Cost (DIY)
$50 - $3,000
Symptoms
- ⚠️Transmission slipping
- ⚠️RPM flares during shifts
- ⚠️Harsh engagement
- ⚠️Check engine light
Related Symptoms
Common Causes
How to Diagnose P0730
- 1Check transmission fluid level and condition
- 2If fluid is dark/burnt, service transmission
- 3Check for specific solenoid codes
- 4Transmission may need rebuild if fluid is OK
OEM Diagnostic Flowchart
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Read live data and freeze frame for P0730 to pinpoint the cause before buying parts.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0730.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Legacy F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair manu...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F4-2.5L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru XV Crosstrek F4-2.0L DOHC Service Manual | Operation CHARM Operation CHARM : Car repai...
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0730 on this vehicle.
Open the exact repair flow most commonly associated with P0730 on this vehicle.
Open the exact repair flow most commonly associated with P0730 on this vehicle.
Related Symptoms
Browse →Slipping, flare, or delayed-shift complaints usually need fluid condition, hydraulic pressure, and internal wear checks before major replacement.
A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.
Exact Vehicle Hubs
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Open the exact vehicle hub for a repair workflow commonly associated with P0730.
Open the exact vehicle hub for a repair workflow commonly associated with P0730.
Open the exact vehicle hub grounded by OEM manual evidence related to P0730.
Open the exact vehicle hub grounded by OEM manual evidence related to P0730.
Open the exact vehicle hub grounded by OEM manual evidence related to P0730.
Related Codes
The TCM (Transmission Control Module) has detected a fault and sent a message to the ECM. This is a general indicator that transmission-specific codes are stored.
Fault in the torque converter clutch (TCC) solenoid circuit.
Frequently Asked Questions
- Is P0730 a death sentence for the transmission?
- Not necessarily — it could be as simple as low fluid. Check fluid first. If fluid is fresh and full, internal wear is more likely.
- How much does a transmission rebuild cost?
- Professional rebuild: $1,500-$3,500. Remanufactured transmission: $1,000-$2,500. Always check fluid first.
Related Repair Guides
If your vehicle has triggered P0730, these DIY repair guides may help: