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Old 10-18-2016, 04:57 PM
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'Maintenance Required' light

So ironically my maintenance required light came on after 120,000k miles and have done a bit of reading. Seems that I need to replace a EGR and PCV valve. My question is what is needed to shut off the dummy light? Some reading states disconnecting battery overnight and some say this doesn't work. Some state after 50 cranks of the ignition. I'm in California and not sure yet when it comes to smogging, if this will be an issue. Anyone have any tried and true methods? Thanks!

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Old 10-18-2016, 08:06 PM   #2
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As I understand it, it's a mechanical timer that triggers the light after so many miles. It is NOT a real indication of the health of ANY component. A dealer will have to reset it, or you can just take the bulb out like I did. It's a complete waste of time, IMO.

Just noticed the Cali part. I'm not sure how it affects your emission crap.


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Old 10-18-2016, 08:25 PM   #3
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Originally Posted by ToxikT View Post
As I understand it, it's a mechanical timer that triggers the light after so many miles. It is NOT a real indication of the health of ANY component. A dealer will have to reset it, or you can just take the bulb out like I did. It's a complete waste of time, IMO.

Just noticed the Cali part. I'm not sure how it affects your emission crap.



+1

It is purely mileage based and requires a dealer only scan tool to reset. Fortunately, they were kind enough not to combine it with the check engine light, so ignoring it, removing the bulb, or cutting the wire to it do not risk masking a secondary failure.

Not a bad idea to do the recommended maintenance as well...


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Old 10-19-2016, 08:26 AM   #4
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Well... Ya know what's weird is that I bought m yj at 110k miles and it's at 140k (this reminds me- oil change tonight), so I know I had to out it through the 120k window, but i don't ever remember the check light coming on. As far as how to solve this: pull the bulb as a last resort. Is the maintenance required light the same as the check engine light (I probably sound pretty stupid right now but it's early and I'm still tired)? If it is try the key trick. On-off x4, watch the blinking lights count the numbers, you'll get sets of 2 (35, 47, etc. nothing should be higher than 55). Those will tell you whats wrong and should get the light to shut off. YJs don't have anywhere to plug a scanner as far as I know, so... Yeah, you get the picture. Good luck, hope this helped.
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Old 10-19-2016, 11:01 AM
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Earl, Different light...which made me a LOT happier. Your bulb may have already been pulled.

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Old 10-19-2016, 11:05 AM   #6
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Earl, Different light...which made me a LOT happier. Your bulb may have already been pulled.

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Now i have to tear my dash apart so I can figure out if it is broken or if the bulb is pulled. Either way it's eating away at me right now lol...
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Old 10-20-2016, 07:17 PM   #7
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Pulled my bulb. Should only take about 20 minutes and very few, if any swear words. I can't imagine the great inspectors in CA are going to pull your dash off to see if you have any light bulbs burnt or missing. I'd think you will be fine to pull.

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Old 10-20-2016, 08:11 PM   #8
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If it's the same oxygen sensor "timer" it is just a clock designed to run about 80000 miles before closing the circuit to the light. Once tripped, it isn't designed to be reset but replaced. In lieu of pulling the bulb you can pull the plug off the timer. It's a translucent plastic box about 4x4 inches square full of white nylon gears up under the dash.

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