The Lemon IndexFourth gear isn't matching the expected engine-to-wheel speed, which usually means slipping in that gear.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Low or burnt fluid. Then: worn clutches; solenoid or valve body fault.
Owners named P0734 in 28 complaints to the U.S. government, most often on the Ford F-Series.
Cars owners report it on
Complaints that name P0734, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2018 Ford F-Series · 2020 Ford F-Series · 2011 Chrysler Town & Country
Transmission problems by year: Ford F-Series · Chrysler Town & Country · Ford Escape
The details
What P0734 means
Fourth gear isn't matching the expected engine-to-wheel speed, which usually means slipping in that gear.
Can I drive with P0734?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
43% of the owner complaints that name P0734 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 P0734
- Low or burnt fluid
- Worn clutches
- 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: 43% of complaints
- Loses power or goes into limp mode: 29% of complaints
- Stalls or shuts off: 11% of complaints
- Warning lights and electrical faults: 11% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0734 most
2018 Ford F-Series (4), 2020 Ford F-Series (4), 2011 Chrysler Town & Country (2).
Related codes
P0733 P0735 P0732 P0736 P0731 P0730 P0729 P0740
Quick answers
What does P0734 mean?
Gear 4 Incorrect Ratio. Fourth gear isn't matching the expected engine-to-wheel speed, which usually means slipping in that gear.
Can I drive with P0734?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes P0734?
Low or burnt fluid; Worn clutches; Solenoid or valve body fault.
Counts: NHTSA owner complaints whose text names P0734. 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.