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What does code P0730 mean and is it safe to drive?

P0730: Incorrect Gear Ratio. Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.

Powertrain

What this code means

The transmission control module has detected that the actual gear ratio does not match the commanded gear, indicating a slipping or internal transmission issue.

Common causes

  • Low or burnt transmission fluid
  • Internal clutch or band wear
  • Faulty shift solenoids

Symptoms

  • Check Engine Light or transmission warning light
  • Harsh shifts, slipping, or delayed engagement
  • Limp mode in some vehicles

Typical fixes

  • Check and service transmission fluid
  • Replace faulty solenoids or valve body
  • Overhaul or replace transmission if internal damage is severe

Repair cost range

Repairs for P0730 often fall between $200 and $4000, depending on the cause and your vehicle.

See this code for your make

We have guides for P0730 on every make. Select yours for make-specific causes and cost context.

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