Porsche boxster cold car gearbox is not in gear.

There are several reasons why the automatic transmission can't upshift normally:

1, the throttle cable or throttle position sensor is not adjusted properly. Check and adjust the throttle cable and throttle position sensor to eliminate the fault.

2. If the vehicle speed sensor fails, check the vehicle speed sensor and replace it.

3. If the shift valve is stuck or the gear switch fails, check the gear switch signal. If there is no fault in the control system, remove the automatic transmission.

Automatic transmission must be filled with automatic transmission oil specified by the manufacturer. Automatic transmission must not add manual transmission gear oil, main reducer special oil or engine oil by mistake, otherwise all clutches and brakes will be seriously ablated after driving for a period of time.

Automatic transmission should be replaced with automatic transmission oil in time. When replacing automatic transmission, the crude oil should be drained as clean as possible. The automatic gearbox should strictly control the oil filling amount, and the clutch and brake should be cleaned in time after ablation. The hydraulic system of the torque converter has two oil inlet holes, one at the bottom of the control valve body.