SES light- No codes, but weird idle problem.

Every few weeks my SES light will come on, but my predator doesn't show any codes.

The light comes on any time, idling or on the interstate. All fluid temps, pressures, and levels are normal.

Now, I dont know if this is related- but it does have a miss in I believe the #1 (front, passenger) cylinder (this plug was worn different than the rest). It only happens after extensive idling. The car idles lean (according to narrowband a/f gauge) and after 10-15 minutes, the ECU will switch to open loop mode (this brings it closer to stioch, but still lean) and the car will idle extremely choppy. Tapping the throttle a few times returns to closed loop mode and idle is smooth. The last predator update I did fixed it for a while, but now its back.

Mods in sig, Any ideas?

bdcardinal said:

does the predator pull manufacturer specific codes. the manu specific codes are P1xxx. a P1000 is still a genenric. the SES light only comes on if there is a code present. there could be a malfunction with the lightbulb.

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Yes, I'm sure the predator is capable of pulling any code. They're made vehicle specific for diagnostics and such.

I doubt theres a problem with the bulb, it tests fine in the built-in test mode (holding the trip reset button).