One that works with OBD II.
Use a code scanner to find out what's wrong with your VW.
Borrow, rent or buy a diagnostic code scanner. It will tell you what you need to know. The computer turns on the light just to say that it has found a problem but you need to use the code scanner for the computer to tell you what it has found.
There are handheld bar code scanners, so a handheld bar code scanner is a bar code scanner, but a bar code scanner is not necessarily a handheld scanner. There are bar code scanners in store checkout stands that are fixed, and there may or may not be an associated handheld scanner there for the clerk to use to scan, say, a large bag of dog food that the customer doesn't want to hoist up onto the counter.
Trouble code 62477 for the Ford Windstar typically indicates an issue related to the vehicle's powertrain control module (PCM) or an associated sensor. This code may be triggered by problems such as wiring issues, faulty sensors, or communication errors within the vehicle's electronic systems. To properly diagnose the issue, it's recommended to use a diagnostic scanner to retrieve more specific information and perform a thorough inspection of the related components.
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All vehicles since 1994 use r-134. A
The light is on to tell you that the computer has information for you. Use a code scanner and the computer will tell you why the engine is not running well.
You got to use a OBD 2 code reader or scanner
You need to use an OBDII scanner (available at your local auto parts store) to see what the diagnostic code is. Depending on what what fault code is, you either have to fix something or you can clear it and see if the code returns. You can clear the code (turn out the light) with the OBDII Scanner. Personally i bought a ScanGaugeII for this and it's AWESOME! the Haynes and Chilton repair manuals will help you figure out what the code means.
YOU CAN USE A FORD CODE SCANNER TO RETRIEVE CODES. AFTER CODE ITEMS ARE REPAIRED, FOLLOW INSTRUCTIONS IN CODE SCANNER BOOK TO RESET COMPUTER IN CAR.
To reset a fault code in a 2001 Dodge Cummins diesel, you can use an OBD-II scanner to read and clear the codes. Connect the scanner to the OBD-II port, turn the ignition to the "On" position without starting the engine, and follow the scanner's instructions to erase the codes. Alternatively, you can disconnect the battery for about 15 minutes to reset the engine control module, which will clear the fault codes. However, ensure to address the underlying issue before resetting to avoid reoccurrence.
Depending on the year, use either an OBD1 or OBD2 code scanner. You can borrow, rent or buy a code scanner from most auto parts retailers.