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If u know of someone who has an old scanner u can easily access the codes. Otherwise u need to jump pins a and b in the doc together with the ignition.on but the motor not running. The check engine light will flash codes. Long flashes are r tens and fast flashes r ones. It will start with 12. One long and then 2 fast. This will sequence 3 times and then go on to more codes. Once u have the codes u can look them up to get to the correct failure area. U may still need a pro to diagnosis it further but u will have a clue to the affected failure. Fyi the 12 is just a distributor code that will show up since the engine is not running. This is a normal code and should be ignored.
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
I am assuming you have a Pontiac Grand Am. You would need to have someone scan the computer for trouble codes to proceed. The codes will point you in the direction of the problem but not tell you what to replace or repair.
oil pres should rise as the engine goes faster, the faster it goes the faster oil pump pumps oil pres should also be higher when oil is cold ( oil is thicker) as far as # 2 cyl miss fire cheak spark plug is good 2 start. mybe coil wire. cheak it with ohm meter. is check engine light on ? might have to get it scaned
The warning light comes on for a variety of reasons, anything from an ignition problem to vacuum leak. You can take it to your local dealership or auto parts store and they can usually hook up a reader to the computer in your car and read the trouble code which well tell you exactly why the light came on.
If you would like to read the code yourself here is what you do:
To check the fault code yourself from the comfort of your own garage, put the ECM in "Diagnostic Test Mode II" by doing the following:
1) Sit your **** in the driver's seat. 2) Turn the ignition key to the ON position and wait three seconds. (Do not start the car.) 3) Fully depress and release the accelerator pedal five times in less than five seconds. (If you've got bad ankles, give up now and drive the car to the dealer.) 4) Wait exactly seven seconds. Fully depress the accelerator pedal and hold it down for about ten seconds until the MIL light begins flashing. 5) Release the accelerator pedal and start counting flashes to obtain the four-digit trouble code. 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.) The next three digits follow in turn in the same fashion except with faster blinks (0.3 second) and a 1.0-second pause between digits.
The ECM code repeats intself until you turn the ignition key to the OFF position, at which point the ECM resets itself to standard get-in-and-drive-the-car mode. You can look up the trouble codes in the ESM/FSM; there's a bunch of them. In the ESM, refer to page EC-639. Additionally, if you get four blinks of ten (0000), the ECM is indicating no malfunction.
You can clear the code (and the annoying MIL) by holding down the accelerator pedal for more than 10 seconds while in Diagnostic Test Mode II. When you release the pedal, the ECM erases the trouble code(s).
This sounds like a problem with the throttle position sensor. Take the car to an autoparts store and have them scan the computer for fault codes stored. Most parts stores will do the scan for free. Getting the codes will narrow down the cause of the problem and should eliminate the need for speculation. Sorry for your trouble and I hope this helped. Best wishes.
nine times out of ten your check engine light means you need a new gas cap. as for your accellerater that could be a linkage issue , if you have a broken motor mount the engine will lean against the linkage . the harder it leans the faster it goes ... the faster it goes the harder it leans