Intermittent check engine light

ds968 · 2016-10-20T22:48:34-05:00

I spent over five hours this afternoon in what was one of the bay area's worst traffic nightmares in recent memory , the overwhelming majority of which was just sitting still and idling . When and if moving, I was inching forward at probably less than 1 or 2 mph. So after about 4 hours of this hell, my check engine light came on . And then it went off . And then a few minutes later it came on again. And then off again for a couple of minutes . This pattern repeated itself for the entire last hour of the drive home . BTW the center " ! " ( aka " idiot " or " big-ass scary light " ) light never came on at any time, just the lower right panel 's " check engine " light . I'll do a blink test tomorrow morning to see what the fault codes might reveal, but is it possible that I may have burned out a O2 sensor because of the hours upon hours of just idling ? EGR valve or hose ? Vacuum issues ?

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Intermittent check engine light

Waylander
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#41

09-16-2018, 05:22 AM

These sensors can be tested with just a multimeter

I would also test the wiring back to the ECU

One of my friends cars had some work done and they put the sensor back not quite square and the plate spinning on the camshaft smashed the sensor to bits and bent the plate on the cam shaft

I think I would be tempted to take it to bits, and test every wire, part, and connection

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