Torque Converter Lock-Up Solenoid Circuit
1999-2000 BMW 323i E46 2.5L I6
Description
The DME or EGS detected a malfunction in the torque converter lock-up solenoid circuit. The solenoid controls engagement of the torque converter clutch for improved fuel efficiency at highway speeds.
Symptoms
- Check Engine Light
- No torque converter lock-up
- Reduced fuel economy on highway
- Transmission overheating
- Slight RPM flare at cruise
Common Causes
- Faulty torque converter clutch solenoid
- Wiring fault in solenoid circuit
- Connector corrosion
- Low transmission fluid level
- EGS driver circuit failure
Diagnostic Steps
- Test TCC solenoid resistance
- Inspect wiring to solenoid
- Check transmission fluid level and condition
- Monitor TCC commanded vs actual engagement
- Check connector at transmission
Repair Notes
Replace the torque converter lock-up solenoid or repair the wiring fault.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1755 on Other Vehicles
Common Questions
What does code P1755 mean on a 1999-2000 BMW 323i E46?
P1755 stands for "Torque Converter Lock-Up Solenoid Circuit". The DME or EGS detected a malfunction in the torque converter lock-up solenoid circuit. The solenoid controls engagement of the torque converter clutch for improved fuel efficiency at highway speeds.
What are the symptoms of P1755 on a BMW 323i E46?
Common symptoms of P1755 include: Check Engine Light, No torque converter lock-up, Reduced fuel economy on highway, Transmission overheating, Slight RPM flare at cruise.
What causes P1755 on a 1999-2000 BMW 323i E46?
Common causes of P1755 include: Faulty torque converter clutch solenoid, Wiring fault in solenoid circuit, Connector corrosion, Low transmission fluid level, EGS driver circuit failure.