P0733 KIA Code - Third Gear Incorrect Ratio
Quick Answer
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows: Torque converter slip ratio = A x C/B A: Output shaft revolution signal from revolution sensor B: Engine speed signal from Engine Control Module (ECM) C: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (3rd) supposed by TCM, the slip ratio will be more than normal. Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0733 KIA indicates Third Gear Incorrect Ratio.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Shift solenoids.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0733 KIA Description
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (3rd) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
What are the Possible Causes of the DTC P0733 KIA?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0733 KIA?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0733 KIA code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0733 KIA Code
1. What does the OBDII code P0733 mean on a Kia?
P0733 indicates that the transmission control module (TCM) has detected an incorrect gear ratio in third gear, suggesting a potential issue with the transmission or related components.
2. What are the common symptoms of the P0733 code in a Kia?
Symptoms may include harsh shifting, slipping in third gear, reduced fuel efficiency, the check engine light turning on, and in some cases, the vehicle entering limp mode.
3. What causes the P0733 code to appear on a Kia?
Common causes include low or dirty transmission fluid, a faulty shift solenoid, worn-out clutch packs, damaged transmission bands, or issues with the transmission control module.
4. Can low transmission fluid cause the P0733 code in a Kia?
Yes, low or dirty transmission fluid can lead to improper hydraulic pressure, causing the incorrect gear ratio and triggering the P0733 code.
5. How is the P0733 code diagnosed on a Kia?
A mechanic will typically use a scan tool to confirm the code, inspect the transmission fluid level and condition, check for transmission slippage, and test the shift solenoids and related components.
6. Can I drive my Kia with the P0733 code?
Driving with the P0733 code is not recommended, as it can lead to further damage to the transmission and potentially leave you stranded if the transmission fails completely.
7. How do you fix the P0733 code on a Kia?
Repairs may include replacing or refilling transmission fluid, repairing or replacing a faulty shift solenoid, fixing damaged clutches or bands, or reprogramming the transmission control module.
8. Does the P0733 code always mean the transmission is failing?
No, the P0733 code doesn’t always indicate transmission failure. It may be caused by simpler issues like low fluid or a malfunctioning solenoid, which are easier and less expensive to fix.
9. How much does it cost to fix the P0733 code on a Kia?
Repair costs can vary widely depending on the cause. Simple fixes like fluid replacement may cost $100–$200, while more complex repairs such as solenoid replacement or transmission rebuilds can exceed $1,000.
10. Can a software update fix the P0733 code on a Kia?
In some cases, a software update to the transmission control module can resolve calibration issues that may be causing the P0733 code, but this must be determined through proper diagnostics.
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