2002 Dodge Grand Caravan: OBD Error codes P1684 and P0303?

This are Obd error codes which gets stored in cars computer also called as ECM.

This error codes which came up means as follows:-----


P1684 is for battery disconnected in the last 50 ignition cycles. If the battery was disconnected for any reason within last 50 times the engine has been started, we can ignore this code. If it hasnt, then a possible loose connection at the battery or low voltage/weak battery condition exists.

P0303 is the cause of the shuddering. This is an engine misfire in cylinder #3. This could be from a bad or broken spark plug, faulty or loose plug wire at the plug or coilpack, fault coilpack, burnt/dropped valve, faulty fuel injector.


Get the Compression test done for cylinder number 3 and other cylinder.If the compression is low on cylinder number 3,then it has to be replaced.

This will help.
Thanks.

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How to reset check engine light ?

There are three ways to reset a check engine light. 

1. Disconnect the battery, wait approximately 30 minutes, reconnect the battery. This resets the cars computer which also reset the check engine light. On newer OBD (on-board diagnostic) compliant vehicles this usually does not work. See step 2. 

2. Reset using an OBD II reader. When you hook an OBD II code reader up to your vehicle, you can reset the computer using the code reader. 


3. Fixing the problem. Generally the check engine light comes on for a reason. Usually it is emission related (sensors, gas cap) or electrical (faulty wiring). In this case the way to reset the check engine light is to fix the problem.
This details will help.
Thanks.


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For more car related problem troubleshooting:---

This are the sections, you can go through and click the link to read its troubleshooting.

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The car will not start?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-start.html

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Car will not crank?

http://schematicsdiagram.blogspot.com/2011/06/car-will-not-crank.html

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Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

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How to troubleshoot car battery?

http://schematicsdiagram.blogspot.com/2011/06/how-to-troubleshoot-car-battery.html

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How to test starter solenoid?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html

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How to test cars starter?

http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html

How to replace starter in car?

http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-starter-in-car.html

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car will turn over but will not start?

http://technoanswers.blogspot.com/2011/05/car-will-turn-over-but-will-not-start.html

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Car wont start?

http://howtobyme.blogspot.com/2011/10/car-wont-start.html

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