Chevrolet Trailblazer Ext U0121 Engine Error Code
When you check Chevrolet Trailblazer Ext car engine light came on code U0121 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Chevrolet 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.
To solve U0121 Chevrolet Trailblazer Ext problem, you'll have to remove the muffler, crankcase and other components blocking the valve chamber. Then, remove the cylinder head bolts (label for easy re-installation) Adjust the jaws of the valve spring compressor until they touch the top and bottom of the valve chamber Push the tool in to compress the spring and tighten the jaws Remove the retainers and lift out the valves , compressors and springs
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Chevrolet Trailblazer Ext U0121 OBD-II Diagnostic Network (U) Trouble Code DescriptionChevrolet Trailblazer Ext 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 commReason For Chevrolet Trailblazer Ext U0121 CodeThe reason of Chevrolet Trailblazer Ext U0121 OBD-II Engine Error Code is U0121 Lost Communication With Electronic Brake Control Module. |
The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. U0121 Chevrolet Trailblazer Ext code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.
Chevrolet Trailblazer Ext U0121 Possible Solution :
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What does fault code U0121 mean for Chevrolet Trailblazer Ext ?
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