Audi S3 U0121 Engine Error Code

When you check Audi S3 car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Audi manufacturer may have a different definition for the U0121 OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.

A good ground connection is also extremely important. U0121 Audi S3 engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).

Audi S3 U0121 OBD-II Diagnostic Network (U) Trouble Code Description Audi S3 car U0121 OBD-II Trouble Code Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and comm Reason For Audi S3 U0121 Code The reason of Audi S3 U0121 OBD-II Engine Error Code is U0121 Lost Communication With Electronic Brake Control Module.

There are currently two main types of cylinder deactivation used today, depending on the type of engine. U0121 Audi S3 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.

Audi S3 U0121 Possible Solution :

In-line Ford engines, along with those of most other manufacturers, begin the numbering of cylinders at the front and proceed in numerical order toward the back. In the V-engine design, Ford follows a similar design with the number one cylinder at the front left of the engine. In the V-6 configuration, cylinder 4 is at the front right of the engine and in a V-8, cylinder number 5 is in that location. Other manufacturers sometimes use an alternating pattern in the V-engines.

What does fault code U0121 mean for Audi S3 ? What does a diagnostic reading U0121 mean for Audi S3 ? How to fix OBD2 Code U0121 for Audi S3 ? What do we know about U0121 code for Audi S3 ?