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Re: service engine light
It's different for different cars. Some cars can turn the light off by having the battery disconnected for a few hours. Others require a certain number of drive cycles (either a certain number of ignition on/off cycles with mileage accrued, or a certain number of trips of at least a few miles), and others can only be turned off with a scan tool.
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Usually a blinking service light indicates a severe problem, you should get the codes read to determine what the computer is trying to tell you what the problem is. Its a free service at most Autozone and Advance Auto parts stores. Once you get the codes, repost to obtain possible repair procedures.
The following directions will help you decode your 2002-2006 Nissan Altima's Service Engine Soon (SES) light and reset it.<br />
<span style="font-weight: bold;">Obtain The Trouble Code</span><br />
<li>Turn the ignition key to the ON position and wait three seconds.</li>
<li>Put the accelerator pedal to the floor and release it five times in less than five seconds.</li>
<li>Wait exactly seven seconds. Put the accelerator pedal to the floor for ten seconds until the SES light flashes.</li>
<li>Release the accelerator pedal and start counting flashes to obtain the four-digit trouble code.<br /></li></ol>
<li>Long flashes (0.6 seconds) indicate the first digit of the code; count
the blinks one through nine and write down the first digit. (Ten blinks
indicates a zero.) </li>
The next three digits blink
faster (0.3 second) and have a 1 second pause between digits.</li>
<li>The ECM code repeats until you turn the ignition key to the OFF
<li>You can look up the trouble codes in the Service Manual.</li>
<li>If you get four blinks of ten, or 0000, the ECM indicates no malfunction.<br /></li></ul>
<br style="font-weight: bold;" /><span style="font-weight: bold;">Clear The Trouble Code</span><br />
Clear the code and the SES light by holding the
accelerator pedal down to the floor for 10 seconds or more while the SES light is
<li>When the pedal is released, the ECM will erase the trouble
the check engine light alerts you that there are problems. There will be a code or codes stored in the engines computer. You can retrieve these codes one of three ways.
1. call your local auto parts store. Many times they will do this for free.
2. buy an inexpensive code reader. Available just about anywhere that has an automotive department. They will start at about $50.
3. Bring it in to a shop to have a check engine light diagnostic done.
Once you know the code you can then start to focus on a repair. Once a repair is made the codes will be cleared and the check engine light will turn off. If you do not make the repairs the light will not stay off. It will continue to come on and stay on until the proper repair is made.
If the Service Engine light is on, you need to scan your Engine Control Module and retrive the fault codes to see why the computer has turned the light on. The fault codes will tell you which one of the many systems monitored by the computer is malfunctioning. Once you have that information, then the faulty system can be diagnosed to find the actual cause of the problem. After the repairs are made, the computer needs to be reset so the light will go off. Restting the computer and turning the light off without properly diagnosing and repairing the cause of the problem will only result in the light coming back on again.
The "service" engine light is on for a reason, the On Board Diagnostic (OBD) is sensing a problem with some part of the car. The service light will stay on until the problem is resolved. It is unlikely that the problem will resolve by itself and so it needs human intervention. You or a mechanic can hook up an OBD code reader and determine what code(s) is causing the engine light to illuminate. If you want to do it yourself, a simple code reader can be purchased for about $100+, you usually get what you pay for. Also, some auto part stores offer to hook up their code reader in hopes that you'll purchase the repair parts from them. Once the problem is determined, it can be repaired, and the car should turn the service light off. It is also possible to turn off the service light with the OBD code reader, but this is not advisable for the novice to do. For more help, contact me again at FixYa and I will be glad to assist.
The check Engine Light may have activated because of the Transmission fault. The best and easiest way to identify the fault code is to take the vehicle to Auto Zone or another Auto parts store that offers to read trouble codes for free.
The light has to be reset using a scan tool or code reader. What you are actually doing to turn off the "check engine" or "service engine soon" lamp is clearing the service codes. Disconnecting the battery cable won't clear the codes on most vehicles built after 1994. You should note what the service code[s] are that caused the computer to turn the light on and have those problems repaired othewise the light will come on again after a few drive cycles once the computer sees that the same problems are still there.
You need the interface module and the OBD software to clear the trouble code; clearing the trouble code will then turn off the light. FYI - after clearing the trouble code, you have to drive about 40 -50 miles before the vehicle is ready for inspection test