P0734 Mitsubishi Code - Gear 4 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 (4th) 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
- P0734 Mitsubishi indicates Gear 4 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 P0734 Mitsubishi 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 (4th) 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 P0734 Mitsubishi?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0734 Mitsubishi?
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 P0734 Mitsubishi 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 P0734 Mitsubishi Code
1. What are the common symptoms of OBDII code P0734 (Gear 4 Incorrect Ratio) in a Mitsubishi?
- Common symptoms include harsh shifting between gears, delayed shifting into or out of gear, and the vehicle staying in one gear despite acceleration.
2. What are the possible causes of OBDII code P0734 in a Mitsubishi?
- The code P0734 can be triggered by issues such as low transmission fluid levels, a faulty transmission solenoid, a worn-out clutch, or problems with the transmission control module.
3. How can I diagnose OBDII code P0734 in my Mitsubishi?
- Diagnosing code P0734 involves using a diagnostic scanner to retrieve the trouble codes, checking the transmission fluid level and condition, and inspecting the transmission components for any visible damage or wear.
4. What are some DIY repair tips for fixing OBDII code P0734 in a Mitsubishi?
- DIY repair tips include checking and topping up the transmission fluid, inspecting and replacing any damaged wiring or connectors, and testing the transmission solenoids for proper operation.
5. Can driving with OBDII code P0734 cause further damage to my Mitsubishi?
- Continuing to drive with code P0734 can potentially cause further damage to the transmission components over time, leading to more costly repairs in the future.
6. How much does it typically cost to repair OBDII code P0734 in a Mitsubishi?
- The cost of repairing code P0734 can vary depending on the specific underlying issue, but it may range from a few hundred dollars for minor repairs to over a thousand dollars for more extensive transmission repairs.
7. Should I clear the OBDII code P0734 in my Mitsubishi after making repairs?
- After making repairs to address code P0734, it is recommended to clear the code using a diagnostic scanner to reset the system and see if the issue has been successfully resolved.
8. Can a faulty speed sensor trigger OBDII code P0734 in a Mitsubishi?
- Yes, a faulty speed sensor can disrupt the proper gear ratio calculations in the transmission, leading to the triggering of code P0734 in a Mitsubishi.
9. Is it safe to continue driving my Mitsubishi with OBDII code P0734 if the symptoms are not severe?
- It is not recommended to drive your Mitsubishi with OBDII code P0734, as unresolved transmission issues can worsen over time and potentially lead to more significant problems.
10. How can regular maintenance help prevent OBDII code P0734 in a Mitsubishi?
- Regular maintenance, such as changing the transmission fluid at recommended intervals and addressing any minor transmission issues promptly, can help prevent the occurrence of code P0734 in a Mitsubishi.
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