P0729
Gear 6 Incorrect Ratio
P0729 is an OBD-II diagnostic trouble code meaning: Gear 6 Incorrect Ratio. Common causes: low or contaminated transmission fluid, worn friction discs or gears. Estimated repair cost: $56–278.
Symptoms
- Unstable operation in 6th gear
- Automatic gear shifting
- Check Engine light comes on
- Decreased fuel efficiency
- Acceleration problems
Causes
- Low or contaminated transmission fluid
- Worn friction discs or gears
- Shift solenoids malfunction
- Problems with shaft speed sensors
- Mechanical damage in the gearbox
How to Fix
- Check the level and condition of the transmission fluid
- Diagnose the operation of switching solenoids
- Check input and output shaft speed sensors
- Perform diagnostics of the mechanical part of the gearbox
- If necessary, replace worn components
Related codes
Error P0729 by Vehicle Brand
FAQ
What does the P0729 code mean?
P0729 is an OBD-II diagnostic trouble code that indicates: Gear 6 Incorrect Ratio
What causes a P0729 error code?
The most common causes of P0729 include: Low or contaminated transmission fluid; Worn friction discs or gears; Shift solenoids malfunction; Problems with shaft speed sensors.
How do I fix a P0729 diagnostic trouble code?
To fix P0729: Check the level and condition of the transmission fluid. Diagnose the operation of switching solenoids. Check input and output shaft speed sensors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0729?
Yes, but get it checked soon
How much does it cost to fix P0729?
The estimated repair cost for P0729 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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