Oldsmobile Cutlass Supreme U0121 Engine Error Code

When you check Oldsmobile Cutlass Supreme car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Oldsmobile 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 Oldsmobile Cutlass Supreme engine diagnostic code is about in terms of how often you should get your tyres rotated, it's different for every vehicle and type of tyre, but having them rotated at every oil change is a good rule of thumb. Check with the tyre manufacturer for a more specific time frame. Remember that the more often you rotate your tyres, the more evenly they'll wear, and when you have the tyres rotated, you should also get them checked for balance and alignment.

Oldsmobile Cutlass Supreme U0121 OBD-II Diagnostic Network (U) Trouble Code Description Oldsmobile Cutlass Supreme 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 Oldsmobile Cutlass Supreme U0121 Code The reason of Oldsmobile Cutlass Supreme 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 Oldsmobile Cutlass Supreme 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.

Oldsmobile Cutlass Supreme 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 Oldsmobile Cutlass Supreme ? What does a diagnostic reading U0121 mean for Oldsmobile Cutlass Supreme ? How to fix OBD2 Code U0121 for Oldsmobile Cutlass Supreme ? What do we know about U0121 code for Oldsmobile Cutlass Supreme ?