The Lemon IndexThe transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping. Full P0730 page
37 owner complaints · the #3 code Honda Odyssey owners name · 14% of Honda Odyssey complaints that name a code (every car: 0.5%)
Middle of 104,000 miles · most between 75,000 and 120,000 (35 owners gave it)
Honda Odyssey owners named P0730 in 37 complaints to the U.S. government (NHTSA), most often on the 2003, 2002 and 2004 model years, at a middle of 104,000 miles. The part they name most is the transmission (replaced or rebuilt) (20 complaints). Complaints are owner reports, not proof of a defect.
Honda Odyssey model years that report P0730
Owner complaints naming P0730, by model year. Raw counts: years that sold more get more complaints, so this is each model year's record, not a failure rate.
Mileage when it happened
104,000 miles is the middle of what 35 owners entered. Half were between 75,000 and 120,000 miles.
The mileage on the complaint form, when the owner gave one.
What owners say caused it or fixed it
The most-named part is the transmission (replaced or rebuilt), in 20 of the 37 complaints (54%). 20 of those mention it being replaced or repaired, and 2 say the problem came back afterwards.
- Transmission replaced or rebuilt20 complaints20 mention a repair or replacement, 2 of them say the problem came back · what Honda Odyssey owners paid
19 complaints mention a recall and 11 mention a warranty.
Counted from the owners' own words: a part counts when a sentence names it with a cause or repair word. What owners wrote, not a diagnosis. A shop should confirm the cause before replacing parts.
Symptoms owners describe with P0730
65% of these complaints say the check engine light came on.
- Transmission slips or shifts hard30%11 of 37 complaints
- Overheats14%5 of 37 complaints
- Loses power or goes into limp mode11%4 of 37 complaints
- Brakes or ABS act up5%2 of 37 complaints
Share of the complaints naming P0730 whose text also describes each problem. A complaint can describe more than one.
Codes owners report with it
P0740 5 P0780 4 P0845 3 P1750 2
Other codes named in the same Honda Odyssey complaints, and in how many.
Repair costs
- Transmission replacement$4,2826 bills · middle bill
- ECM (engine computer) replacement$2,9791 bill
- Engine mount replacement$9201 bill
Repair bills owners named in these 37 complaints (8 in all). Owner reports, not a quote: costs vary by shop and region.
Recalls on these Honda Odyssey years
- Transmission & drivetrain · 2002, 2003, 2004 · issued 2004
ON SOME MINI VANS, SPORT UTILITY AND PASSENGER VEHICLES, CERTAIN OPERATING CONDITIONS CAN RESULT IN HEAT BUILD-UP BETWEEN THE COUNTERSHAFT AND SECONDARY SHAFT SECOND GEARS IN THE AUTOMATIC TRANSMISSION, EVENTUALLY LEADIN… NHTSA 04V176000
1 recall for the same systems (powertrain) on the Honda Odyssey model years above. A recall for the same system isn't proof it's behind P0730. Recall work is free at any dealer: check a VIN at nhtsa.gov/recalls or with our VIN check.
Keep going
- P0730: meaning, causes and every car that reports it
- Honda Odyssey reliability by year
- 2003 Honda Odyssey problems and recalls
Other codes Honda Odyssey owners report
U3000 P0740 P0301 P0304 P0303 P219A P0302 P0420 P3400 P3497
The details
How we count
We read every owner complaint in the NHTSA file whose text names this trouble code, and count the ones filed about this model (matched by the make, model and model year on the complaint). Mileage is what the owner entered on the form.
Parts: a complaint counts for a part when one of the owner's own sentences names that part together with a cause word (failed, bad, diagnosed, caused by, leaking ...) or a repair word (replaced, repaired, new, reprogrammed ...). "Came back" means the same complaint also says the problem returned or the repair didn't fix it. These are counts of what owners wrote, not a diagnosis, and one complaint can name several parts.
Complaints are reports, not proof of a defect, and most owners never file one. Popular models get more complaints, so the counts are not a failure rate. The code meaning is the standard SAE J2012 definition in our own words, or the carmaker's meaning where we verified it for that make.
What P0730 means
The transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
- Low or burnt fluid
- Worn clutches or bands
- Solenoid or valve body fault
Check the complaints yourself
NHTSA complaint numbers (search them at nhtsa.gov): 10670975, 10661496, 10642019, 10610071, 10562348, 10533782, 10509990, 10495101, 10491667, 10473238, 10472783, 10459966 and 25 more.
Quick answers
What does P0730 mean on a Honda Odyssey?
Incorrect Gear Ratio. The transmission isn't matching the expected engine-to-wheel speed in some gear, which usually means slipping.
Which Honda Odyssey years have the most P0730 complaints?
In complaints to NHTSA, owners of the 2003 (17), 2002 (15), 2004 (2) Honda Odyssey named P0730 most (37 complaints in all, 2000–2004). Raw counts, not a failure rate.
What fixes P0730 on a Honda Odyssey?
Owners most often name the transmission (replaced or rebuilt) (20 of 37 complaints). That's what owners wrote, not a diagnosis: have a shop confirm the cause with a scan and tests before replacing parts.
At what mileage does P0730 show up on a Honda Odyssey?
Owners who gave their mileage reported a middle of 104,000 miles; half were between 75,000 and 120,000 (35 owners).
Can I drive my Honda Odyssey with P0730?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Sources: NHTSA owner complaints that name P0730 on the Honda Odyssey, counted by The Lemon Index; NHTSA recalls; repair bills owners named. Meanings: SAE J2012 in our own words. Owner reports, not a diagnosis or repair advice for your car.