P0730 is a generic OBD-II trouble code that means: Transmission Gear Ratio – Incorrect Ratio. Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).
What does P0730 mean?
P0730 is a generic OBD-II trouble code that means: Transmission Gear Ratio – Incorrect Ratio. The engine control module (ECM) stores this code when it detects a fault related to: Transmission Gear Ratio.
Can I still drive?
Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).
Symptoms
- Check engine light is on
- Harsh or delayed gear shifts
- Car goes into limp mode
Common causes
- Low or degraded transmission fluid
- Faulty transmission solenoid or valve body
- Damaged wiring or a loose/corroded connector
- Faulty sensor or component
How to fix it
- Read all stored codes and freeze-frame data with an OBD-II scanner
- Check the transmission fluid level and condition
- Inspect the wiring and connectors for damage, corrosion or looseness
- Test the sensor with a multimeter against the manufacturer's specification
- Replace the faulty component with a quality part
- If unsure, have a qualified mechanic diagnose it
Frequently asked questions
What does code P0730 mean?
P0730 is a generic OBD-II trouble code that means: Transmission Gear Ratio – Incorrect Ratio. The engine control module (ECM) stores this code when it detects a fault related to: Transmission Gear Ratio.
What causes code P0730?
The most common causes are: Low or degraded transmission fluid; Faulty transmission solenoid or valve body; Damaged wiring or a loose/corroded connector; Faulty sensor or component.
How do I fix code P0730?
Start with these steps: Read all stored codes and freeze-frame data with an OBD-II scanner; Check the transmission fluid level and condition; Inspect the wiring and connectors for damage, corrosion or looseness; Test the sensor with a multimeter against the manufacturer's specification.
Is it safe to drive with code P0730?
Severity: High. Avoid driving. This fault can cause stalling, overheating or expensive damage (such as to the catalytic converter or engine).