P0744 on Citroen
Torque Converter Clutch Circuit Intermittent
P0744 on Citroen vehicles indicates torque converter clutch circuit intermittent. Au7o has documented this code across 1 Citroen model — most commonly on C3. This code means the transmission computer detected an intermittent (on-and-off) problem with the torque converter clutch (TCC) circuit. The torque converter clutch locks up to create a direct mechanical link between the engine and transmission at cruising speed, improving efficiency, and the computer monitors that circuit and the converter's slip. When the lockup signal or engagement comes and goes erratically, this code sets. Drivers often feel shuddering, slipping, or surging at steady speeds, or the engine RPM may flare; it points to an electrical, fluid, or mechanical fault in the lockup system. Typical repair costs on Citroen range from $600 to $3,000, depending on the specific model and root cause.
Common Causes of P0744
- •Low, dirty, or degraded transmission fluid
- •Failed or stuck torque converter clutch solenoid
- •Intermittent or chafed solenoid/TCC wiring
- •Corroded or loose transmission connector
- •Worn torque converter or internal clutch
- •Clogged valve body passages or sticking valve
- •Faulty transmission control module (TCM)
P0744 on Citroen by Model
Citroen C3(1 issue)
- SensoDrive/EGS/ETG Automated-Manual Gearbox and Clutch Actuator Failure2003-2016
C3s fitted with Citroen's automated-manual gearboxes — SensoDrive on the C3 I, then EGS6/ETG6 on later e-HDi and PureTech cars — suffer well-documented failures of the electronic clutch actuator, gear actuator and gearbox ECU. Worn actuator motors and clutch-position adaptation errors cause violently jerky gearchanges, refusal to select gears, gearbox warning messages with the box locked in gear (limp mode), and in some ECU failures a car that will not start. Specialist rebuilders describe the actuator and ECU faults as inherent design weaknesses, and repairs at a dealer can run from several hundred to several thousand pounds.
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What does P0744 mean on Citroen?▼
P0744 stands for "Torque Converter Clutch Circuit Intermittent." This code means the transmission computer detected an intermittent (on-and-off) problem with the torque converter clutch (TCC) circuit. The torque converter clutch locks up to create a direct mechanical link between the engine and transmission at cruising speed, improving efficiency, and the computer monitors that circuit and the converter's slip. When the lockup signal or engagement comes and goes erratically, this code sets. Drivers often feel shuddering, slipping, or surging at steady speeds, or the engine RPM may flare; it points to an electrical, fluid, or mechanical fault in the lockup system. On Citroen specifically, this code is documented across 1 model.
What causes P0744 on Citroen vehicles?▼
Common causes on Citroen: Low, dirty, or degraded transmission fluid, Failed or stuck torque converter clutch solenoid, Intermittent or chafed solenoid/TCC wiring, Corroded or loose transmission connector, Worn torque converter or internal clutch. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0744 on a Citroen?▼
Repair costs on Citroen range from $600 to $3,000, depending on the specific model and root cause.
Which Citroen models have P0744 documented?▼
Au7o has documented P0744 on 1 Citroen model: C3.