P0734 2006 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 2006 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 2006 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 2006 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 2006 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 2006 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.
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Frequently Asked Questions about P0734 2006 Nissan Altima Sedan Code
1. What does the OBDII code P0734 mean on a 2006 Nissan Altima?
P0734 indicates a "4th Gear Ratio Incorrect" fault, meaning the transmission is not maintaining the correct ratio for 4th gear.
2. What are common symptoms of the P0734 code in a 2006 Nissan Altima?
Symptoms include slipping in 4th gear, poor acceleration, decreased fuel economy, and the Check Engine Light being illuminated.
3. What causes the P0734 code to appear in a 2006 Nissan Altima?
Common causes include low or dirty transmission fluid, a faulty transmission control module (TCM), worn clutch components, or internal transmission damage.
4. Can low transmission fluid cause the P0734 code?
Yes, low or degraded transmission fluid can lead to improper gear ratios and trigger the P0734 code.
5. How can I diagnose the P0734 code in my 2006 Nissan Altima?
Start by checking the transmission fluid level and condition, inspecting wiring and connections, and using an OBDII scanner to monitor gear ratio data.
6. Is it safe to drive with the P0734 code active?
It is not recommended to drive with this code active as it can cause further damage to the transmission and lead to unsafe driving conditions.
7. What repairs are commonly needed for the P0734 code?
Repairs may include replacing or flushing the transmission fluid, repairing or replacing wiring, reprogramming the TCM, or rebuilding the transmission.
8. Does the P0734 code always mean the transmission is failing?
No, the P0734 code can also result from simpler issues like low or dirty transmission fluid, which may not require major repairs.
9. How much does it typically cost to fix the P0734 code on a 2006 Nissan Altima?
Costs vary depending on the cause, ranging from $100 for a fluid change to over $2,000 for a transmission rebuild.
10. Can updating the transmission software fix the P0734 code?
In some cases, a TCM software update can resolve the issue if the code is caused by a programming error.
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