P0744 2003 Infiniti G35 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 2003 Infiniti G35 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 2003 Infiniti G35 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 2003 Infiniti G35?
- 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 2003 Infiniti G35?
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 2003 Infiniti G35 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 2003 Infiniti G35 Code
1. What does the OBDII code P0744 in a 2003 Infiniti G35 indicate?
- The code P0744 specifically points to an issue with the Torque Converter Clutch Circuit Intermittent in the transmission system.
2. What are the common symptoms of a P0744 code in a 2003 Infiniti G35?
- Common symptoms include rough or delayed shifting, decreased fuel efficiency, and the transmission slipping or overheating.
3. What are the possible causes of a P0744 code in a 2003 Infiniti G35?
- The P0744 code can be triggered by issues such as a faulty torque converter clutch solenoid, wiring problems, low transmission fluid levels, or a malfunctioning torque converter.
4. How serious is a P0744 diagnostic trouble code in a 2003 Infiniti G35?
- Ignoring a P0744 code can lead to further damage to the transmission system and potentially result in costly repairs if left unresolved.
5. Can I continue driving my 2003 Infiniti G35 with a P0744 code?
- It is not recommended to continue driving the vehicle with a P0744 code as it can cause additional damage to the transmission and compromise the safety and performance of the car.
6. How can I diagnose a P0744 code in my 2003 Infiniti G35?
- Proper diagnosis involves using an OBDII scanner to retrieve the code, inspecting the transmission system for visible issues, and testing the torque converter clutch solenoid and related components.
7. What are some repair tips for fixing a P0744 code in a 2003 Infiniti G35?
- Repair options may include replacing the torque converter clutch solenoid, repairing any damaged wiring, ensuring proper transmission fluid levels, and addressing any underlying mechanical issues.
8. How much does it cost to repair a P0744 code in a 2003 Infiniti G35?
- The cost of repairing a P0744 code can vary depending on the extent of the damage, parts needed, and labor costs, but it can range from a few hundred to over a thousand dollars.
9. Can I reset the P0744 code in my 2003 Infiniti G35 without repairing the issue?
- While you can clear the code temporarily, it will likely reappear if the underlying problem is not fixed, so it is recommended to address the root cause of the P0744 code.
10. How can I prevent a P0744 code from appearing in my 2003 Infiniti G35?
- Regular maintenance, such as checking and changing transmission fluid as recommended, can help prevent issues that may trigger a P0744 code.
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