Holden Commodore U0121 Engine Error Code

When you check Holden Commodore car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Holden 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.

U0121 Holden Commodore engine problem can be occur defective fan clutches are a common and often overlooked cause of engine overheating. The shear characteristics of the clutch fluid gradually deteriorates over time, with an average loss in drive efficiency of about 200 rpm per year. Eventually slippage reaches the point where effective cooling is no longer possible and overheating results. (On average, the life of a fan clutch is about the same as a water pump. If one needs to be replaced, the other usually does too.)

Holden Commodore U0121 OBD-II Diagnostic Network (U) Trouble Code Description Holden Commodore 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 Holden Commodore U0121 Code The reason of Holden Commodore U0121 OBD-II Engine Error Code is U0121 Lost Communication With Electronic Brake Control Module.

While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the U0121 Holden Commodore code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.

Holden Commodore U0121 Possible Solution :

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

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