P0734 2004 Nissan Altima Sedan Code - 4th. Gear Malfunction
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 2004 Nissan Altima Sedan indicates 4th. Gear Malfunction.
- 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 2004 Nissan Altima Sedan 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 2004 Nissan Altima Sedan?
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
How to Fix the DTC P0734 2004 Nissan Altima Sedan?
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 2004 Nissan Altima Sedan 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.
Need more information about the P0734 2004 Nissan Altima Sedan code?
Need more information on how to fix the P0734 2004 Nissan Altima Sedan code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0734 2004 Nissan Altima Sedan code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0734 2004 Nissan Altima Sedan Code
1. What does OBDII code P0734 mean on a 2004 Nissan Altima?
Code P0734 indicates a 4th gear ratio malfunction, meaning the transmission is not engaging or maintaining 4th gear as expected.
2. What are the common symptoms of a P0734 code in a 2004 Nissan Altima?
Symptoms include slipping or failure to shift into 4th gear, poor acceleration, reduced fuel efficiency, and the check engine light being illuminated.
3. What causes the P0734 code in a 2004 Nissan Altima?
Common causes include low or dirty transmission fluid, a faulty transmission control module (TCM), damaged shift solenoids, worn clutch packs, or internal transmission damage.
4. Can a P0734 code damage my 2004 Nissan Altima if not fixed?
Yes, driving with this issue can cause further damage to the transmission, leading to more expensive repairs if left unresolved.
5. How do I diagnose a P0734 code in my 2004 Nissan Altima?
Diagnosis typically involves checking the transmission fluid level and quality, scanning for additional codes, testing the shift solenoids, and inspecting the transmission components.
6. Can low transmission fluid cause a P0734 code?
Yes, low or degraded transmission fluid can prevent proper hydraulic pressure, leading to shifting issues, including the 4th gear malfunction.
7. How much does it cost to repair a P0734 code in a 2004 Nissan Altima?
The cost varies depending on the cause. A fluid change may cost $100-$200, while solenoid replacement or transmission repairs could cost $500-$2,500 or more.
8. Can I drive my 2004 Nissan Altima with a P0734 code?
It’s not recommended to drive extensively with this code, as it can worsen transmission damage and affect vehicle safety.
9. Will replacing the shift solenoid fix the P0734 code?
Replacing the shift solenoid may fix the issue if it's determined to be the root cause, but a thorough diagnosis is needed to confirm.
10. Does resetting the check engine light clear the P0734 code?
Resetting the light may temporarily clear the code, but if the underlying problem isn’t fixed, the code will likely reappear.
Discuss the causes and fixes for P0734 2004 Nissan Altima Sedan OBDII Code
Code P0734 2004 Nissan Altima Sedan comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
