P0734 - Gear 4 Incorrect Ratio

Transmission gear 4 ratio is incorrect.

Code Overview

Transmission gear 4 ratio is incorrect.

Common Causes

• Low or dirty transmission fluid
• Shift solenoid issue
• Valve body issue
• Internal clutch or band wear

Diagnostic Steps

1. Check fluid level and condition
2. Scan for solenoid and speed sensor codes
3. Inspect connector for fluid intrusion
4. Road test while monitoring gear command

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.