C1665 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.

C1665 Code Symptoms :

The C1665 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. C1665 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 C1665

Parts or components should not be replaced with reference to only a C1665 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

How to fix C1665 code ?

• Damaged VCT phaser
• Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
• Engine Control Module (ECM)
• Faulty Mass Air Flow (MAF) sensor