P0734
Gear 4 Incorrect Ratio
P0734 is an OBD-II diagnostic trouble code meaning: Gear 4 Incorrect Ratio. Common causes: wear of friction discs 4th gear, low transmission fluid level. Estimated repair cost: $56–278.
Symptoms
- Erratic gear shifting
- Delays when switching to 4th gear
- Power dips
- Transmission fluid overheating
- Check Engine light comes on
Causes
- Wear of friction discs 4th gear
- Low transmission fluid level
- ATF contamination or degradation
- Shift solenoids malfunction
- Problems with speed sensors
How to Fix
- Check the level and condition of the transmission fluid
- Scan TCM Trouble Codes
- Check operation of shift solenoids
- Diagnose the mechanical condition of the transmission
- If necessary, replace worn components
Related codes
Error P0734 by Vehicle Brand
FAQ
What does the P0734 code mean?
P0734 is an OBD-II diagnostic trouble code that indicates: Gear 4 Incorrect Ratio
What causes a P0734 error code?
The most common causes of P0734 include: Wear of friction discs 4th gear; Low transmission fluid level; ATF contamination or degradation; Shift solenoids malfunction.
How do I fix a P0734 diagnostic trouble code?
To fix P0734: Check the level and condition of the transmission fluid. Scan TCM Trouble Codes. Check operation of shift solenoids. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0734?
Limited driving only, diagnose soon
How much does it cost to fix P0734?
The estimated repair cost for P0734 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat