My check engine light came on today. i had a

The Automatic Transmission Diagnostic System Check is an organized approach to identify a problem created by an automatic transmission. The Diagnostic System Check - Engine Controls in Engine Controls - 4.2L or Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L is the diagnostic starting point for an automatic transmission complaint. The Diagnostic System Check - Engine Controls in Engine Controls - 4.2L or Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L and 6.0L directs you to the next logical step for diagnosing a transmission concern. Perform this check only if there is a driveability complaint or if you have been directed here from another service information section.
Follow the table to help reduce diagnostic time and help prevent unnecessary replacement of good parts.

1. Install a scan tool.
Important: Check for applicable service bulletins before proceeding with this test. Perform this test only if there is a driveability complaint or if you have been directed to this table from another section in the service information.
Important: Do not turn the ignition OFF when performing this diagnostic procedure. Do not clear the DTCs unless instructed by this diagnostic procedure.

2. Turn ON the ignition, with the engine OFF.

Does the scan tool turn ON?
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Go to Step 2
Go to Diagnostic Starting Point - Data Link Communications in Data Link Communications

2
Is the MIL ON?
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Go to Step 3
Go to Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.2L or Malfunction Indicator Lamp (MIL) Inoperative in Engine Controls - 4.8L, 5.3L and 6.0L

3
Attempt to establish communication with the PCM controller module or modules.
Does the scan tool communicate with the PCM control module or modules?
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Go to Step 4
Go to Diagnostic Starting Point - Data Link Communications in Data Link Communications

4
Important: Diagnostic Trouble Codes (DTCs), engine performance, and transmission default actions can greatly affect the transmission performance. Ensure that these items are not the cause of a transmission concern.
Use the scan tool Capture Info function in order to save or capture (Store Info) any DTC Information.
Are there any DTCs present?
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Go to Diagnostic Trouble Code (DTC) List/Type
Go to Symptoms - Automatic Transmission
Your best bet is take to transmission repair shop or the dealer

Same as every other problem anyone has had since 1981
some 32 model years

Always start by checking for codes

You do have a check light on

Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Hello,

I am unable to find a P2009 code. The closest I have come across is a P2109 which is:

THROTTLE/PEDAL POSITION SENSOR "A" MINIMUM STOP PERFORMANCE

Which will usually be accompanied by:

• Improper idling.
• Poor driving performance.
• Engine stalls.

Also the "Cruise" light will always flash when the Check Engine light is on with these later models, but it does not mean there is a concern with the Cruise control. The diagnostic checks for these cars require the SDS: Subaru Diagnostics System.(A laptop computer with Subaru specific diagnostic software). These concerns are unfortunately not easy to diagnose w/out Subaru dealership resources. I hope this info helps.

When the Check Engine Soon Light comes on , your first instinct is to pull over and check out the situation. This is not necessary. This is the vehicles way of letting you know at its earliest stage that an error has occurred. No need to panic. If you have been driving with that all annoying light on, remember this : Your gas mileage will improve if the necessary repairs are made.
LOOKING FOR CODE INFORMATION GO HERE : DIAGNOSTIC TROUBLE CODES




The first thing to do when your "Check Engine Soon" light comes on is to determine the immediate cause. Consider if the vehicle is still performing as usual or if a loss of performance is noticeable. Generally a constant illuminated light without loss of performance points to an emissions related issue( this won't leave you stranded). When the light flashes, this indicates a serious engine failure condition and will require immediate attention. You may wish to take your vehicle to a local shop and have Computer Diagnostics performed. Usually costs under $100.00.

Generally all vehicles from 1996 and up have an OBD II computer. The Major problem when it comes to OBD II is that you can no longer acquire the trouble codes by counting the flashes of the Check Engine light like you could on earlier OBD I vehicles. You can take your car into a local high-tech service shop, where the minimum charge for computer diagnostics and engine diagnostics might cost you somewhere into three digits. Or you may want to learn about OBD II systems. in order to do so you will need an OBD II scan tool. I have already done the research for you and located several different scan tools for you to choose from. If you already have the code and need to know what it means check out our complete list of OBD II Codes Here.

OBD II scan tools connect to the vehicle's computer through a connector under the dash by the steering wheel.

check engine oil

You will need to pull a DTC (computer diagnostic code) from the PCM (engine computer). This will require a code reader ($40.00) or you can go to an Autozone and they can pull this code for free. Then, and only then, can a diagnostic procedure begin. The computer in vehicles today have the ability to assist us in repair procedures.

You will need to have engine codes pulled from vehicles computer and perform repair, before the light will go off.
Any diagnostic repair shop should be sufficient to help you. A place that specializes in engine diagnostics and engine repair.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/david_62314e5b2470e8b5