Question about 2001 Nissan Altima

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Cannot reset (shut off) SES light after repair

Had a Cat Conv. code. Milage on vehicle is 111,000. New Conv. installed by Henry's Muffler in Raleigh, NC. After repair mechanic unable to reset the ECM. The SES light immediately comes back on after reset. Same if battery disconnected and reconnected. Car is in exceptionally good condition and runs perfectly.

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  • Donald DaCosta
    Donald DaCosta Aug 26, 2014

    This problem was corrected by John West Auto, a local (Raleigh, NC) auto service center. Mr. West was recommended by Henry's Muffler. He hooked his computer to the diagnostic port, fiddled with the controls (sorry. I don't know the details of the procedure) and the problem was fixed.


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You may have to wipe the ecu by a pro. Or the repair wasn't done correctly either or would work

Posted on Apr 15, 2014

Testimonial: "Can't answer either way until it's fixed which may take awhile. But appreciate the input."

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Posted on Jan 02, 2017

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Check to see if the floor on the passanger side is wet. If so, than your A/C drain clogged up and your ECM/computer got flodded by water causing all sorts of funky stuff happening. Right next to the gas pedal is a small cover attached to the computer. It has a clip in it. Remove the clip and tug on the cover. Look at the top of the computer to see if its rusted up. Remove the other side cover also, which is on passanger side floor next to your left foot(if you sitting in passenger seat). and check other side of ECM/computer. Check the ECM for rust on top.
If ALL of that looks OK, than I would replace the switch,(since you are telling me that the key got VERY hot) that is mounted on the back of the ignition cylinder. Its a white round switch that failes after a while especially car beeing 1996, just think about how many times that ignition has been turned ON/OFF since 1996. The mechanism in the switch failes, causing starting issues and funky electrical issues.
Does the car have a remote starter installed?? Or didi it have one in the past?? I have seen companies that install them cause some damage to the harnesses on the switch that is mounted to the back of the igniton cylinder. They use "scotch locks" to connect the remote starter and after a while the connection corrode and cause problems too.
Anyways, check the computer for rust first. Than I would install that switch on back of the igniton. You can buy the switch seperately. You dont need the whole ignition assembly/switch only. Switch is pretty cheap (approx $50 ?). Try that and post results. I would feel pretty good about the switch beeing faulty. I have ssen them fail in the past and that's where your power comes into for the starter circuit.(key getting HOT, switch shorting out, making the key hot and starting the car without the key)

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SOURCE: service engine soon

Check for any loose wire harness connection or bad contacts.

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SOURCE: 2005 Nissan Sentra 1.8s...SES light on. PLEASE HELP!

well if the head gasket has been replaced you shouldnt smeel any coolant. But have you check your coolant hoses???? for leaks or any coolant on the driveway, when your car has been sitting there overnight!???

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SOURCE: Reset SES light on Murano.....

I had a similar problem. I took it to a near by auto zone and asked them if they could hook up their scanner to the computer and clear the ses light. The light was reset and that fixed the problem. You might want to try this since they do it for free. Hope this helps.

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SOURCE: brake and battery dashboard lights remain on with

If the brake and battery light are illuminated then you should have your alternator tested. It is possible that your charging system is failing in some way. Make sure your belt is on the engine. If the belt is on then make sure it is in good condition and tight. Make sure battery terminals are tight. Have the charging system tested.

Posted on Sep 07, 2009

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