#Genisys scan tool problems datastream how to

The freeze frame may show what sensor reading was out of specs. Sometimes an intermittent problem can trigger the Check Engine light, but when a mechanic checks the car with a scan tool, everything works OK. The freeze frame can also greatly help when diagnosing intermittent problems. Could that be why the Check Engine light came on? What if you have a trouble code that says the engine runs lean, meaning the air-fuel mixture supplied into the engine has too much air and too little fuel? The freeze frame shows the fuel level was at 3.5 percent (the tank was almost empty) when the code was set. If this is too much, then see if you can find a scantool that will read the Datastream, Nemisys comes to mind, but its only one directional as well. However, the datastream for the climate control system on my scan tool showed a bogus reading for the evap air discharge temp sensor. On hers, there was no diagnostic code either from the self test or according to the scan tool.

In many cases, knowing this information can point your diagnostic efforts in the right direction. The cheapest of these is the Genisys, these you can get for 950, the others go up in price sharply, although there is not much to choose between a Genisys or TECH2. You may want to try swapping the drivers side and passenger side sensors and see if that changes the behavior. The freeze frame can also show what was the fuel level in the tank and the battery voltage. It can tell at what rpms the fault happened, at what speed and how much time passed since the engine was started. This freeze frame shows the fuel level is only at 3.5 percent (almost empty), when the PCM detected the faultДepending on the data available, a freeze frame can tell you whether the engine was cold or warmed up or what was the temperature outside (Intake Air Temperature IAT). Signs of automatic transmission problems.

#Genisys scan tool problems datastream how to

How to check the engine when buying a used car The Genisys scan tool is perfect for diagnosing the engine, drivetrain, ABS, or TPMS problems that come into your shop.How to get the best deal on a used car?.What you should know when buying a used car.