S&T Series Blazer, Bravada, Envoy, Jimmy, Rainier, Trailblazer, Xtreme

OBD II Warmup Cycle


Once the MIL is off, a stored trouble code will remain in memory until 40 warmup cycles are completed without the fault occurring.

A warmup cycle is defined as a trip that includes a change in engine temperature of at least 40ºF and where it reaches 160ºF.

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Fig. OBD II Warmup Graphic