Thank you for all your contributions on the topic of M & S flashing, I realize that the topic was discussed many time, below is my similar problem with the M & S lights flashing on my Disco II 2003, 4.0L V8. Mileage:78,000 miles
Bought the car and drove it for 11 straight months without any issues, one day in Nov 14, I had a dead battery which I changed into new. Later, in Feb, I got the M & S flashing on the dashboard while driving, stopped the engine, and restarted and all clear for another month or so. Later in April, I got the error again, it was more stubborn this time, it would go only if I clear it with my OBD device, until a week later when it was permanently on, and while diagnosing the error, I was given P0335 which indicated that something could be wrong with Crankshaft Positioning Sensor, which I replaced with a used one that was readily available with my mechanic, and the error has gone for a week, and then got back, and decided to get a new one, waited for 2 weeks (online order to East Africa) and fitted the new one, and was good for only another week.
Now it is June and I’m still getting the error every day, but there is a pattern now. Early in the mornings when I’m off to drop the kids to school (Tropical weather all year round). I reverse the car back out of the garage or drive straight out of the garage (depending on how I entered the garage earlier). I drive a bit on a slight slope, a minute of driving later, 2 scenarios can occur:
Scenario 1: The engine roughs up a bit and the M & S lights come up along with the ‘Check Engine’ light. The car gearbox switches to limp mode and drives on third gear, when this happens I park and stop the engine, clear the error with OBD, and drive normally for the rest of the day.
Scenario 2: If I manage to detect the roughing up of the engine before the M& S lights start flashing, I go in ‘N’ quickly, then back to ‘D’ and no error, and I keep driving the car normally all day long.
Note: I get the error more or less at the same spot every day.
Now, I’m puzzled to whether this could be related to:
1- A battery issue, when I change the dead battery, I had to go for a Korean brand that was widely available in the market, Hyundai Enercell 12V, 70Ah, 750CCA. Could be that the battery was in perfect condition when I bought it 7 months ago? And now it is acting up!? Would a 90Ah battery do a better job? Would it affect anything negatively?
2- Or is it the Alternator, affected by a battery that is acting up? Or just the alternator?
3- Could be the XYZ gear selector switch? I have intentionally listed this till the end, because I believe that it is ok, and I would like to think of it as the last culprit, because it is expensive and is a delicate process to replace.
As indicated above, I have also tried to reverse the car in the garage and drive out on ‘D’ not on ‘R’ as I used to do, same result. I have also have done the test of switching the wipers on, and engaging the gear on ‘R’, the rear wiper works fine perfectly, every time I try it.
Any insight or help from experience would be appreciated,
Nabil