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How can Datastream be useful when diagnosing a DTC?

How can Datastream be useful when diagnosing a DTC?

Proper in-depth datastream analysis can often light the way toward correct diagnosis of driveability concerns. Recording all available DTCs, pending DTCs, freeze frame data and Mode 5 and Mode 6 results before clearing any DTCs is essential.

Should you clear codes after repair?

Most codes will reset after a number of drive cycles. A drive cycle includes starting and driving the car for a minimal distance and shutting it off. Normally a week of normal driving will re-set it IF there is no additional problem. …

How to interpret and use freeze frame data?

Because of how important freeze frame data is to your diagnostic efforts, you want an easy way to understand what the data is telling you. A good scanner can let you get the data off the computer, but you have more work to do from there. Sure, your scanner will try to interpret the raw code to create something you can read it.

What does DTC mean on OBD2 freeze frame?

This code means that the fuel injector present in bank 1 was in closed-loop mode when the error took place. There’s no fuel injector present in bank 2. The engine might be a 4 or 6 cylinder unit with only a single bank. This DTC refers to the air entering the motor below 100%. It denotes the engine coolant temperature.

Can a freeze frame overwrite fuel trim data?

Made to identify emissions-related faults, freeze frame data could help you identify other problems as well. Only data associated with a misfire fault or fuel trim can overwrite the freeze frame data.

When does a PCM store a freeze frame?

When the engine computer (PCM) detects a fault and turns the Check Engine light on, it also stores a freeze frame related to that fault. A freeze frame is snapshot of data from a number of sensors and components at the time when the fault was detected.

When do you set the freeze frame data?

The freeze frame data is set when the trouble code is set. The fuel trims won’t indicate the health of the catalytic converter. They will indicate if the engine is running rich or lean.

This code means that the fuel injector present in bank 1 was in closed-loop mode when the error took place. There’s no fuel injector present in bank 2. The engine might be a 4 or 6 cylinder unit with only a single bank. This DTC refers to the air entering the motor below 100%. It denotes the engine coolant temperature.

Made to identify emissions-related faults, freeze frame data could help you identify other problems as well. Only data associated with a misfire fault or fuel trim can overwrite the freeze frame data.

When the engine computer (PCM) detects a fault and turns the Check Engine light on, it also stores a freeze frame related to that fault. A freeze frame is snapshot of data from a number of sensors and components at the time when the fault was detected.

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Ruth Doyle