U228D Mercedes-benz G Class OBD Code

OBD/2 U228D error code description and symptoms.

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.

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.

U228D Mercedes-benz G Class Error Code Repair Process :

The scent may U228D 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 U228D, so if the inside of your car speed wheel sensor lr coherency fault 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.

Common Causes of Mercedes-benz G Class U228D OBD2 Code

A common cause of code U228D is the failure of Speed Wheel Sensor LR Coherency Fault, but there are several other possible causes as well, such as ;

Dirty Oil
Continuous oil flow to the VCT piston chamber
Intake Valve Timing Control Solenoid Valve circuit poor electrical connection
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1

U228D 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.

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

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U228D Mercedes-benz G Class OBD Code

U228D Mercedes-benz G Class Error Code Repair Process :

Common Causes of Mercedes-benz G Class U228D OBD2 Code

U228D code for other Mercedes-benz cars