U0989 Trouble Code

View U0989 obd/2 error code description and symptoms. U0989 engine photo

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.

As the engine heats up and combustion becomes easier and more complete, the PCM will command the idling control valve to increase the amount of air entering the engine to suit the changing conditions. However, when the load on the engine changes, say, when some electrical consumers or other systems are either turned on or off, the PCM adapts the signal voltage to the idle control valve to ensure that the idling speed remains stable, and at the RPM specified by the manufacturer.

U0989 Error Code Repair Process :

If your blower fan speed circuit range/performance check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system U0989 and engine control unit are in charge of monitoring a bunch of different blower fan speed circuit range/performance, and if they get a reading that's a little out of whack, up pops the check engine light.

U0989 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

Common Causes of U0989

A common cause of code U0989 is the failure of Blower Fan Speed Circuit Range/Performance, but there are several other possible causes as well, such as ;

Faulty Air Flow Meter
Damaged camshaft position (CMP) sensor
Fuel Injectors circuit poor electrical connection
Fuel tank leaking

U0989 code for all cars

You can view according U0989 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U0989 Alfa Romeo Stelvio

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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