P1743 Code - Torque Converter Clutch Solenoid Failed On Conditions
Quick Answer
The torque converter clutch 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 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
- P1743 indicates Torque Converter Clutch Solenoid Failed On Conditions.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty torque converter clutch 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 P1743 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 P1743?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted
- Transmission internal mechanical problem
How to Fix the DTC P1743?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1743 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 P1743 code?
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Information for Specific Makes
- P1743 Buick — Throttle Position Invalid Signal
- P1743 Cadillac — Throttle Position Invalid Signal
- P1743 Chevrolet — Throttle Position Invalid Signal
- P1743 Ford — Torque Converter Clutch Solenoid Failed On Conditions
- P1743 GMC — Throttle Position Invalid Signal
- P1743 Hyundai — Position 4 Short To Ground
- P1743 Lincoln — Torque Converter Clutch Solenoid Failed On Conditions
- P1743 Mazda — Torque Converter Clutch Solenoid Failed On Conditions
- P1743 Mercury — Torque Converter Clutch Solenoid Failed On Conditions
- P1743 Saab — Torque Converter Clutch Solenoid Failed On Conditions
Frequently Asked Questions about P1743 Code
1. What are the common symptoms of OBDII code P1743 (Torque Converter Clutch Solenoid Failed On Conditions)?
The common symptoms of P1743 may include harsh shifting, transmission slipping, engine stalling when coming to a stop, and decreased fuel efficiency.
2. What causes OBDII code P1743 to trigger?
P1743 is typically triggered when the torque converter clutch solenoid fails to engage or disengage properly, leading to issues with the torque converter clutch operation.
3. How serious is OBDII code P1743?
P1743 can lead to significant transmission problems if left unaddressed, potentially causing further damage to the transmission system over time.
4. Can I continue driving with OBDII code P1743?
It is not recommended to continue driving with P1743 as it can result in poor vehicle performance and potential transmission damage. It's best to address the issue promptly.
5. How can I diagnose OBDII code P1743?
Diagnosing P1743 typically involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, inspecting the torque converter clutch solenoid, and conducting a thorough transmission system inspection.
6. What are some repair tips for OBDII code P1743?
Repairing P1743 may involve replacing the torque converter clutch solenoid, inspecting and repairing any damaged wiring or connections, and resetting the trouble code after the repair.
7. Is it possible to fix OBDII code P1743 on my own?
While some DIY enthusiasts may attempt to fix P1743 on their own, it is recommended to have a professional mechanic diagnose and repair the issue due to the complexity of transmission systems.
8. How much does it cost to repair OBDII code P1743?
The cost of repairing P1743 can vary depending on the extent of the damage, parts needed, and labor costs. It's advisable to obtain quotes from different mechanics or repair shops.
9. Can a faulty torque converter cause OBDII code P1743?
Yes, a faulty torque converter or issues with the torque converter clutch operation can potentially trigger OBDII code P1743.
10. How can I prevent OBDII code P1743 in the future?
Maintaining regular transmission fluid changes, addressing any transmission issues promptly, and driving gently can help prevent the occurrence of P1743 in the future.
Discuss the causes and fixes for P1743 OBDII Code
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After bonding the clusher disc, the car was not starating, after diagnosis and erasing the code the car started but it's not enganging into first gear
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