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.