The Lemon Index

Check engine light · Engine codes

P0730: Incorrect Gear Ratio.

Powertrain · GenericP0730
Fix soon
What it means

The transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping.

How serious

Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.

Where a shop starts

Low or burnt fluid. Then: worn clutches or bands; solenoid or valve body fault.

Owners named P0730 in 82 complaints to the U.S. government, most often on the Honda Odyssey.

Models that report it most

Complaints that name P0730, by model. Raw counts, not a failure rate: popular models get more complaints. Tap a model for its years, mileage and what owners say fixed it.

P0730 by model: P0730 Honda Odyssey (37)

The details

What P0730 means

The transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping.

Can I drive with P0730?

Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.

26% of the owner complaints that name P0730 also say the car transmission slips or shifts hard. A complaint can describe more than one problem, so this doesn't prove the code caused it.

Common causes of P0730
  • Low or burnt fluid
  • Worn clutches or bands
  • Solenoid or valve body fault

A shop should confirm the cause with a scan and tests before replacing parts.

What owners describe
  • Transmission slips or shifts hard: 26% of complaints
  • Loses power or goes into limp mode: 11% of complaints
  • Stalls or shuts off: 9% of complaints
  • Brakes or ABS act up: 9% of complaints

Share of complaints naming the code whose text also mentions each problem.

Model years that report P0730 most

2003 Honda Odyssey (17), 2002 Honda Odyssey (15), 2001 Honda Civic (5), 2003 Honda Pilot (5), 2002 Honda Civic (4), 2000 Honda Accord (2).

Related codes

P0731 P0732 P0733 P0734 P0735 P0736 P0729 P0725

Quick answers

What does P0730 mean?

Incorrect Gear Ratio. The transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping.

Can I drive with P0730?

Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.

What causes P0730?

Low or burnt fluid; Worn clutches or bands; Solenoid or valve body fault.

Counts: NHTSA owner complaints whose text names P0730. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.

Updated · Free to use with credit: Source: The Lemon Index (lemonindex.com). Get the data

Spot a mistake or have an idea? Tell us

How can we make Lemon Index better?