The instrument panel of Buick LaCrosse 06 shows that TC fault light and engine fault light are on, and the gear light is always displayed in D gear. The car can still start normally.

1, solenoid valve failure;

2. The oil is dirty, blocking the filter screen of the solenoid valve;

3, actuator gear and impeller wear caused by oil pressure leakage and alarm;

4. The dirty throttle opening reaches 20%, and the engine computer misjudges TC fault.

It can be seen that the fault of traction control system is not a minor fault. If the tc light is on, the owner can't ignore it and go to the repair shop for repair in time.

Common faults of instrument panel

When the engine is at various speeds, the oil pressure gauge has no pressure indication.

Cause of failure: the power cord of lubricating oil pressure gauge is broken; The electric heating coil in the lubricating oil pressure gauge is burnt out; Lubricating oil pressure sensor is damaged; Engine lubrication system failure.

Fault diagnosis: Turn on the ignition switch, remove the lead at one end of the lubricating oil pressure sensor, and conduct instantaneous grounding test. If the needle of lubricating oil pressure gauge moves in the direction of 0. 5 MPa, lubricating oil pressure gauge in good condition. At this time, you can remove the sensor, install the removed wire, insert a nail without a sharp point into the oil hole of the sensor, and press the diaphragm.