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How to check codes without a code reader, and clear them

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270K views 17 replies 12 participants last post by  jayyy  
#1 · (Edited)
To any and all that might be interested, you can save yourself a trip to the local parts store and check codes at home. Find yourself a watch with a second hand and do the following...

---Make sure car has been off for at least 15 minutes.

---Turn ignition switch to 'ON', not running

---Wait 3 seconds

---In the next 5 seconds, fully depress and release gas pedal 5 times

---Wait 7 seconds.

---Depress gas pedal and hold down

---Watch SES (Service Engine Soon) light, it will start blinking

---You can release gas pedal at this point

The SES light will blink out the code/s that are stored in the memory. They all have a 4 digit number. The first digit of each code always blinks slow, followed by a short pause, quick blinks for second digit, short pause, quick blinks for third digit, short pause, and quick blinks for final digit. If more than one code is stored, the computer will blink each in numerical succession until done(it starts over at that point).

Couple of notes on the blinking...

---ten blinks for any digit ='0', zero
---code '0000' means all clear
---add a 'P' in front of the code number when searching for results

The codes can be cleared (and SES light turned off) from the computer while in this diagnostic mode. While the SES light is blinking, simply depress and hold the gas pedal for at least 10 seconds, release pedal, start car. The SES light will go off and stay off if problem does not persist in car, or if repair was completed.

Hope this helps...

B
 
#5 ·
Or just get a OBD Reader from Mac Tools for $60 and you don't have to spend 20 mins trying to figure out codes. Plug into OBD and run the codes.
 
#6 ·
my SES light goes on and then goes off. In other words, it stays on for a couple of weeks then goes off for a couple of more weeks. ITs been doing this for a long time now after I installed my new MAF and new o2 sensors.

Nothings been wrong, it still scans the code, but if it keeps going off, maybe nothing really is wrong and i should restart it?

Has anyone else had this problem?
 
#7 · (Edited)
my SES light goes on and then goes off. In other words, it stays on for a couple of weeks then goes off for a couple of more weeks. ITs been doing this for a long time now after I installed my new MAF and new o2 sensors.

Nothings been wrong, it still scans the code, but if it keeps going off, maybe nothing really is wrong and i should restart it?

Has anyone else had this problem?
See if you can pull a code anyway with the instructions above(there may be one stored, but light may be off...called a temporary code). I have also read that in the case of replacing the MAF, the code will not always clear, and may need to go in and be reset by Nissan. If there is a code, shoot me a PM, and I'll look it up for you.

BTW Mike, I really ought to shoot you...It all started with the blue light in the ignition...Now my damn wife(screenname Ethel) has me adding LEDs on the exterior and interior of her car...LOL
 
#9 · (Edited)
Yes, it (lights) worked out...grrrrrrrrrr

On to your problem. That is the code that I had when I was running without a cat, and my rear O2 intercept was not working properly. It is one that WILL stay locked in the memory. It can refer to the MAF, but can also be caused by the rear O2 sensor as well. There is actually a TSB out stating as much. It is probably still sitting in the temporary code memory.

Try disconnecting the battery overnite(will drain and clear ECM, and also the the short term memory). If that doesn't do it, you may have to take it in to get it cleared. As for $ to clear, I truly could not tell you.
 
#12 ·
Well this method did not work on my 99 altima, but I used my previous method used on my ex 200sx, just as handy info, the ECU lastic black cover on the dirvers side is teh one that should be taken off to get to teh ECU and pull codes manually like here
How to manually pull and define ecu error codes. - NissanForums.com
You are in the 02-06 Altima forums, of course its not going to work. Try here:

http://www.nissanclub.com/forums/1993-2001-nissan-altima-forums/
 
#15 ·
To any and all that might be interested, you can save yourself a trip to the local parts store and check codes at home. Find yourself a watch with a second hand and do the following...

---Make sure car has been off for at least 15 minutes.

---Turn ignition switch to 'ON', not running

---Wait 3 seconds

---In the next 5 seconds, fully depress and release gas pedal 5 times

---Wait 7 seconds.

---Depress gas pedal and hold down

---Watch SES (Service Engine Soon) light, it will start blinking

---You can release gas pedal at this point

The SES light will blink out the code/s that are stored in the memory. They all have a 4 digit number. The first digit of each code always blinks slow, followed by a short pause, quick blinks for second digit, short pause, quick blinks for third digit, short pause, and quick blinks for final digit. If more than one code is stored, the computer will blink each in numerical succession until done(it starts over at that point).

Couple of notes on the blinking...

---ten blinks for any digit ='0', zero
---code '0000' means all clear
---add a 'P' in front of the code number when searching for results

The codes can be cleared (and SES light turned off) from the computer while in this diagnostic mode. While the SES light is blinking, simply depress and hold the gas pedal for at least 10 seconds, release pedal, start car. The SES light will go off and stay off if problem does not persist in car, or if repair was completed.

Hope this helps...

B
 
#16 ·
Trouble code 1273 Bank 1 sensor 1,.2005 2.5L altima with only 78k on it.I hate this F<in #, is there anybody out there that can help me (HELP !!!!!!!)
Yes it worked, but have tried this and light comes back on. I've replaced the O2 sensor,the mitelic O-ring between Cat, and Muffler pipe, the harness connector for the O2 sensor, most of the muffler pipes,clamps and the muffler itself, warmed the car up then turned off,then just turned ignition on and pulled the throttle body connector off the air sensor restated car and let air sensor trouble codes register to recalibrate to new O2 sensor to air sensor, even had nissan dealer service check it out and they tell me the O2 sensor which is a direct replacement is not the right one. could it be the exhaust gasket. HELP. the only thing i have not changed is the check engine light and the software at the inspection station that test the emissions.(LOL) is there anybody out there that can HELP HELP DID I SAY HELP ME!!!!!
 
#17 ·
1273 is a lean condition. My first guess would be either an intake leak (easy to check and inspect), then a dirty MAF...again easy to remove and $10 for MAF spray cleaner). Reset codes and check.

If it comes back, then next up I'd suspect the O2 sensor or dirty injector(s)/fuel pressure. Start with the O2 sensor first...monitor live data (ideally graphed...spray some carb cleaner into the intake box...O2 sensor should spike rich...if it doesn't, or is slow..then replace (which you've already done)...so on to the next. Try cleaning your injectors by running a few tankfuls of premium gas (high detergent) spiked with PEA containing injector cleaner from your local autoparts place. Clear and see if code comes back.

My money's on either a simple air leak, or the MAF being either dirty or poor electrical connections.