U3946 Trouble Code

View U3946 obd/2 error code description and symptoms. U3946 engine photo

The issue covered by the bulletin involves a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

U3946 Error Code Repair Process :

For eic switch-1 assembly circuit short to battery check engine light 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. U3946 error code 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 eic switch-1 assembly circuit short to battery with your car's computers to find out exactly what's prompting the light to turn on.

U3946 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 U3946

A common cause of code U3946 is the failure of EIC Switch-1 Assembly Circuit Short To Battery, but there are several other possible causes as well, such as ;

Exhaust gas leaks
Faulty Air Flow Meter
Ignition coils harness is open or shorted
Open or short in the VCT circuit

U3946 code for all cars

You can view according U3946 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U3946 Volkswagen 1-litre

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

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