U0251 BMW Fault Code

Description:

The input turbine speed sensor detects rotation of the input shaft of the input shaft speed sensor transmission. The computer uses that information, along with the output shaft speed sensor to determine if the transmission is operating according to plan. If the computer detects a difference between the input shaft speed , and the expected output shaft speed, it will adjust transmission pump pressure to prevent clutch disc slip. If adding pressure doesn't solve the problem, it will set a trouble code.

U0251 Code Symptoms :

The U0251 Check Engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. U0251 diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks with your car's computers to find out exactly what's prompting the light to turn on.

Diagnosis And Repairing U0251

Parts or components should not be replaced with reference to only a U0251 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

How to fix U0251 code ?

• Damaged VCT phaser
• Faulty Air Flow Meter
• Faulty starter motor
• Intake Valve Timing Control Solenoid Valve circuit poor electrical connection