Question about 1999 Chevrolet Silverado 1500
Srarts alitle rough at first,then it's good after two minutes, getting code PO137 from scanner obd11
That particular DTC is most likely unrelated to your driveability concern. The P0137 refers to a catalyst monitoring oxygen sensor problem. This DTC will not noticeably affect the way the engine runs. Does it have a P0171 and/or P0174 DTC stored? With this concern on this engine management system, I suspect a vacuum leak after the Mass Air Flow (MAF) sensor, a dirty MAF, A faulty/dirty Manifold Absolute Pressure (MAP) sensor, a ruptured fuel pressure regulator, or low fuel pressure. If it runs basically normal when the engine is warm, it is almost for sure not directly related to an oxygen sensor. If you have other Diagnostic Trouble Codes, address them first.
Posted on May 11, 2014
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Posted on Jan 02, 2017
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