reset my ECU and turn the engine check light off successfully!
I did reset the ECU on my 97 sentra gxe lst weekend. I am writing this to share my experience.
The engine check light came on after I start my engine without connecting the mass airflow sensor. It didn't go off even I reconnect the mass airflow sensor. I think it generated an error in ECU.
The solution is reset the ECU. Here is the right method. http://www.sentra.net/tech/ecu.php?
It is a good article. The only thing that I want to mention here is that you need to do the screw method twice in a row to reset your ECU.
1.With the engine off, turn the ignition to the ON setting.
2. Turn the diagnostic mode selector on the back of the ECU fully clockwise.
3. Wait two seconds and turn the mode selector fully counter clockwise.
4. Turn the diagnostic mode selector on the back of the ECU fully clockwise.
5. Wait two seconds and turn the mode selector fully counter clockwise.
DO NOT turn on your engine between step 3 and step 4. That is the trick.
Btw, on my car, the disconnecting battery method didn't work well. I disconnected it for 4 to 5 hours while it didn't reset my ECU.
Yea, I was reading about that as well. I was pretty sure these were just caused from me removing the distributor and turning it over while harness was removed.
I've started the car about 5 times now...I went for 2 10-15 minute trips and another 35 minute one this morning. The light has stayed off. Am I same to assume there are no codes there now?
More than likely. Honestly what you did should not cause that sensor to go bad, unless it just went bad at that time by coincidence. I would drive it as normal and just keep an eye out for a CEL. Now you can at least pul and check the codes yourself if you get one.
disconnecting the battery really isn't the way to go about it. I've heard that it had to be done for 24 hours, but even still, ECUs have capacitors and programmable memory that can retain the information indefinitely without power. it's the exact same thing as taking the battery out of your cell phone, and a few days later, you power it back up and nothing in the memory was wiped. the old battery trick might work on older cars but on these, where emissions is more of a concern, you're wasting your time.
like they said above, it can be done at the ECU, or if you have OBDII, you can use a scan tool.
"if you aren't really shifting, you aren't really driving."
Completley gutted, Falken Azenis tires on black jax light wheels with 96 Ga16de block with 93 head loaded with 96 cams exhausting through stock pipe into Bassani muffler,and Exedy stage 1 clutch an pressure plate.
it's on the floor under the dash, in the middle of the car, and directly behind the center console.
as for clearing the ECU with the battery...it does work depending on the car. The CEL was on in my 2000 corolla, I fixed the problem and unplugged the battery for 15 minutes and the CEL went out.
Unfortunately, the corolla doesn't have any way to pull the error codes manually like the sentra, so this is really the only option.
the battery thing did not work for my Sentra either, i had to the manual reset...but I looked at the code first to make sure i actually fixed what it wanted.
disconnecting the battery worked on my Sentra, done it twice.
I also fixed an EGR problem ( replaced the little hose) and it took 15 days to go off by itself, car is driven daily for 11 miles each way.
2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
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