Got this code on an 8 hour drive this weekend, about 4 hours into it, lots of highway driving, few stops for pics, gas, food, etc, we were on a road trip to our daughters.
Code is monitored during the transition from 8 to 4 cyl mode.
Set condition is O2 sensor readings on Bank 2 indicate a lean condition while in 4 cyl mode.
Probable causes are:
1. Insufficient oil pressure acting on the lifter locking pins
2. Oil passages restricted
4. MDS solenoid
I need an oil change, 3500 miles on the oil and the last oil change was with dinosour oil, not synthetic. I have used both oils, but mostly non-synthetic, the synthetic does not change our gas mileage so we use reg oil normally. We have 50K on the car. Car runs well. We do have an intermittent high pitch noise at wide open throttle just at the 1/2 shift point that sounds like a belt, I doubt if this has anything to do with the P3497.
Anybody else have this? Did a search of the forum and all I got was that Noid had this but he has a cam and lifters that do not enable MDS. Our car is stock as far as the engine goes. Running SC 91 octane tune.
2005 Inferno Red Magnum RT
Group I and II, sunroof, tow package, nav, sirius, Uconnect, auto headlights, 20" American Racing Torq-Thrust M Wheels, 245/45/R20 Kuhmo Ecsta ASX tires, KW V2 coilover suspension, Hotchkis sway bars, Zoomers Cat Back Exhaust, Aria CAI. LED smoked tail lights. Shaved rear hatch. Pinstriping by 2-Stix. Custom painted palm tree headlights w\halos & painted fog lamps w\halos by AAC.
Custom Billet Tech "palm tree" pieces
And lots of little visual mods that make it ours!
Wish I could help, 59,000+ on my 05 Mag RT 5.7 and have used dino oil every 3000 5w-20 from day one ... been running SC 91 octane tune for years ... maybe you've got a failing MDS lifter? Or somebody gave you non-5w-20 oil at an oil change? Had that happen to me once, didn't throw a code but my MPG tanked by 3mpg when 10w-30 was put in by mistake, by the dealer no less, when the car first came out ... I went frigging ballistic, needless to say that mistake wasn't made again ...no long term damage ... MDS has worked OK ever since ...
Based on your maintenance I'd say you have a bad lifter or MDS Solenoid .... Dealer can find it right away with the StarScan tool. Not a major repair ... should be covered by the 7-70 warranty ...
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