Question about 2002 Chevrolet Impala
2002 Impala. This is the first major replacement I've had done. Car wouldn't turn over to start. Dealer put in a new BCM module and everything is great except now the lean code light comes on. What could be the cause of that?
CHECK engine light is coming on with a lean code? this would not be related to the bcm as this is a body control module . you most likely have a vacuum leak somewhere
Posted on Feb 09, 2009
That means that the mixture of gasoline coming through is not the proper texture it is to "lean". It can be caused by a variety of problems (vacuum leak in the intake manifold, EGR valve failing to close, dirty fuel injectors....If you are not mechanically inclined I would recommend taking it to a reputable shop and having them fix the problem. If you are somewhat mechanically inclined and want to try to tackle this yourself post something to that affect and Me or someone else can walk you through changing the EGR valve (not that hard) for the fuel injectors I would recommend running Chevron or Amoco gas in addition to the Chevron fuel system cleaner. If you have a vacuum leak we can probably walk you through that as well. Just post so and we'll be glad to help any way we can.
Posted on Feb 12, 2009
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Posted on Jan 02, 2017
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Jan 19, 2013 | 1999 Honda Accord
Dec 14, 2012 | 2002 Chevrolet Impala
The engine and the automatic transmission in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine.
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