P0744 2004 Nissan Altima Sedan Code - Torque Converter Clutch Circuit Intermittent
Quick Answer
The Torque Converter Clutch (TCC) solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Torque Converter Clutch (TCC) Solenoid Valve. 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
- P0744 2004 Nissan Altima Sedan indicates Torque Converter Clutch Circuit Intermittent.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Torque Converter Clutch (TCC) Solenoid Valve.
- 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 P0744 2004 Nissan Altima Sedan Description
The lock-up operation, however, is prohibited when A/T fluid temperature is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up conditions, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.
The Diagnostic Trouble Code (DTC) P0744 is detected when A/T cannot perform lock-up even if the electrical circuit is good.
What are the Possible Causes of the DTC P0744 2004 Nissan Altima Sedan?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Torque Converter Clutch (TCC) Solenoid Valve
- Torque Converter Clutch Solenoid Valve harness is open or shorted
- Torque Converter Clutch Solenoid Valve circuit poor electrical connection
How to Fix the DTC P0744 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 P0744 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.
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Frequently Asked Questions about P0744 2004 Nissan Altima Sedan Code
1. What does the OBDII code P0744 mean on a 2004 Nissan Altima Sedan?
P0744 indicates an intermittent issue in the torque converter clutch (TCC) circuit, which can affect the transmission's ability to properly engage or disengage the torque converter clutch.
2. What are the common symptoms of the P0744 code in a 2004 Nissan Altima?
Symptoms can include poor fuel efficiency, transmission slipping, erratic shifting, engine stalling at low speeds, or the check engine light turning on.
3. What causes the P0744 code to appear on a 2004 Nissan Altima?
Common causes include a faulty torque converter clutch solenoid, damaged transmission wiring, low or dirty transmission fluid, or a malfunctioning transmission control module (TCM).
4. Can driving with the P0744 code damage my 2004 Nissan Altima?
Yes, driving with this code for an extended period can cause further damage to the transmission and result in costly repairs.
5. How do I diagnose the P0744 code on a 2004 Nissan Altima?
Diagnosing the code typically involves using an OBDII scanner, checking the transmission fluid level and condition, inspecting the wiring and connectors, and testing the torque converter clutch solenoid.
6. How can I fix the P0744 code on my 2004 Nissan Altima?
Repairs may include replacing the torque converter clutch solenoid, repairing or replacing damaged wiring, flushing and refilling the transmission fluid, or reprogramming or replacing the TCM.
7. Is the P0744 code a serious problem in a 2004 Nissan Altima?
Yes, it can be serious as it affects the transmission's performance and can lead to further transmission damage if not addressed promptly.
8. Can low transmission fluid cause the P0744 code in my 2004 Nissan Altima?
Yes, low or dirty transmission fluid can cause issues with the torque converter clutch operation and trigger the P0744 code.
9. How much does it cost to fix the P0744 code on a 2004 Nissan Altima?
Repair costs can vary depending on the problem, ranging from $100 for a fluid change to $1,000 or more for solenoid or transmission repairs.
10. Can a faulty torque converter cause the P0744 code on a 2004 Nissan Altima?
Yes, a malfunctioning torque converter can cause the TCC circuit to operate intermittently and trigger the P0744 code.
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