P0744 2002 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 Faulty torque converter clutch solenoid valve, Torque converter clutch solenoid valve harness is open or shorted, Torque converter clutch solenoid valve circuit poor electrical connection. 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 2002 Nissan Altima Sedan indicates Torque Converter Clutch Circuit Intermittent.
- Common causes
- Common causes include Faulty torque converter clutch solenoid valve, Torque converter clutch solenoid valve harness is open or shorted, Torque converter clutch solenoid valve circuit poor electrical connection.
- 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 2002 Nissan Altima Sedan Description
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 condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.
What are the Possible Causes of the DTC P0744 2002 Nissan Altima Sedan?
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness is open or shorted
- Torque converter clutch solenoid valve circuit poor electrical connection
- Low transmission fluid level
- Dirty transmission fluid
How to Fix the DTC P0744 2002 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 2002 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 2002 Nissan Altima Sedan Code
1. What does the OBDII code P0744 mean on a 2002 Nissan Altima Sedan?
P0744 indicates an intermittent issue in the torque converter clutch (TCC) circuit, meaning the transmission is struggling to properly engage or disengage the torque converter clutch.
2. What are the common symptoms of P0744 in a 2002 Nissan Altima?
Common symptoms include erratic shifting, decreased fuel efficiency, transmission overheating, slipping gears, or the vehicle stalling at low speeds.
3. What causes the P0744 code to appear in a 2002 Nissan Altima?
Possible causes include a faulty torque converter clutch solenoid, damaged or corroded wiring, low or dirty transmission fluid, or internal transmission issues.
4. Can driving with a P0744 code damage my 2002 Nissan Altima?
Yes, continuing to drive with this code can cause further transmission damage, reduced performance, and potential overheating issues.
5. How can I fix the P0744 code on my 2002 Nissan Altima?
Repairs may include replacing the torque converter clutch solenoid, repairing or replacing damaged wiring, flushing and refilling the transmission fluid, or addressing internal transmission problems.
6. Is it safe to drive my 2002 Nissan Altima with a P0744 code?
It is not recommended to drive for long periods with this code, as it can worsen transmission issues and lead to costly repairs.
7. How much does it cost to repair a P0744 code on a 2002 Nissan Altima?
Repair costs can vary widely. Solenoid replacement may cost $150–$400, while internal transmission repairs can exceed $1,000 depending on the severity.
8. Can low transmission fluid trigger the P0744 code in a 2002 Nissan Altima?
Yes, low or dirty transmission fluid can cause the torque converter clutch to malfunction, leading to the P0744 code.
9. How do I diagnose the P0744 code on my 2002 Nissan Altima?
A mechanic typically uses a scan tool to confirm the code, inspects the transmission fluid condition, tests the solenoid, and checks for damaged wiring or connectors.
10. Will clearing the P0744 code fix the issue in my 2002 Nissan Altima?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.
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