U2118 Trouble Code

View U2118 obd/2 error code description and symptoms. U2118 engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

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.

U2118 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U2118 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If passengers seat belt buckle switch circuit short to battery so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the passengers seat belt buckle switch circuit short to battery.

U2118 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 U2118

A common cause of code U2118 is the failure of Passengers Seat Belt Buckle Switch Circuit Short to Battery, but there are several other possible causes as well, such as ;

Dirty Oil
Camshaft advance mechanism binding (VCT unit)
Exhaust gas leaks
Variable Camshaft Timing (VCT) position circuit is open or shorted

U2118 code for all cars

You can view according U2118 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+U2118 Fiat Bianchina

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