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You should have the error code read from the vehicle's computer (a code scanner is needed for this). If you constantly are disconnecting the battery, some manufacturers program an error code in the computer indicating that the battery has been disconnected within the last XX number of starts. If the code is P1600 or P1630, this is probably your problem. If you're disconnecting the battery for security reasons, either install an aftermarket security/anti-theft system or realize that the check engine light will keep coming on.
You can delete the codes by removing the battery negative terminal for 5 Sec or more. By this method you can only delete the engine and power train codes. ABS and EPS codes cannot be deleted by this method. Better to retrieve and delete the error codes with code reader or diagnostic computer. Make a note of freeze frame data before clearing the codes.
The engine light stays on because the computer has detected a fault code, when disconnecting the battery the memory is cleared but the fault code will eventually be set in the computer again until the problem is fixed, since there are many reasons for the check engine light to come on it is necessary to connect the vehicle to a diagnostic computer that can read the codes, this can be done at most repair shops, the dealer or some autoparts stores.
Disconnecting the vehicle battery can set fault codes in the computer for "INTERNAL MEMORY KEEP ALIVE MEMORY (KAM) ERROR" (code P0603) or "SYSTEM VOLTAGE LOW" (code P0562). These codes do not normally cause the check engine light to come on unless they are "active" codes, meaning that the problem is occuring on THIS ignition cycle.
The check engine light coming on is most likely not related to the battery having been replaced. However, I have seen wierder things! I would recommend scanning your engine computer (OBD codes) and find out which fault codes are present. If there are no codes other than the ones described above, then clear the codes with the scanner and turn the ignition off then restart the engine to see if the light comes back on. If it does, then there is most likely a problem with your battery or battery cables.
If any types of codes other than those mentioned above are present, then each code must be diagnosed to find the cause.
Hi, if your car engine light comes on and after connecting it to the computer it looks o.k, then you should try reseting the engine light by remove the positive battery cable from the battery post and leave it off for about five minutes. Then, reattach the battery cable to the battery. You can do this with a basic 1/2-inch or 9/16-inch wrench. Removing the battery cable will reset the "Check engine" light as long as there is nothing serious wrong with the engine.
The check engine light may come on later. When the check engine light comes on the computer in your car logs a code. This trouble code may or may not cause drivability issues. The computer in your car always tries to fix the problem. If the check engine light is not on, there is not a problem. It may come on later if it detects another problem. Changing the battery could have fixed some problems. The ground system on the cars cause a lot of problems for technitians. If the trouble light is not on, don't look to spend a lot of money to look for problems that the computer is not picking up.
When the Check Engine light comes on that means that the computer in your Explorer has set Diagnostic trouble codes and stored them in the computers memory.After all repairs are made to all D.T.C. The codes need to be erased from your computer, this resets the Check Engine Light, and it should not come on again untill the computer finds another falt.Good Luck.
The easiest way is to disconnect the battery for about five minutes. This will reset the computer and clear any codes. Once you connect the battery you need to take the car out for a drive and let the computer relearn your driving habits. It you have something wrong with the car the check engine light will come on again. You will need to get the error code and fix the problem for the light to stay off permanently. Most car parts places will check your computer for error codes free.
Check engine light with no codes usually means a PCM reset is happening. EBP shorting, ICP shorting, aftermarket "performance chip". PIDS need to be monitored to eliminate sensors. IDMs (Injector Driver Modules) can also cause this. IDM's are separate from the PCM/ECM (engine computer).
I have a 1992, it is not equiped with OBD2
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