U3956 Trouble Code

View U3956 obd/2 error code description and symptoms. U3956 engine photo

Vehicle Speed Sensor (VSS) Intermittent Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), transfer case speed sensor (TCSS), anti-lock brake system (ABS) control module, generic electronic module (GEM), or central timer module (CTM). This DTC is set the same way as U3956. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for U3956

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

U3956 Error Code Repair Process :

The scent may U3956 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such U3956, so if the inside of your car horn relay coil circuit failure as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

U3956 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 U3956

A common cause of code U3956 is the failure of Horn Relay Coil Circuit Failure, but there are several other possible causes as well, such as ;

EVAP system hose leaking
Faulty Fuel injector
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
EVAP system hose leaking

U3956 code for all cars

You can view according U3956 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U3956 Nissan Juke

+U3956 Abarth Monotipo

+U3956 Rolls-royce Silver Spirit

+U3956 Fiat Panda 2

+U3956 Proton 300

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

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