Hi everyone,
As the title shows my 300 is C model and equipped with 5.7 HEMI engine,......55000Millage,
Four months ago parked my car outside driveway with absolute no issues,.....of course disconected the battery before I left,
When I came back after 4 months put the battery back on and start the engine, no problem,
After a few hundred yards, all the ABS, BAS, ESP and red parking light came on and car went to Limp mode,
# I did the steering wheel alignment procedure several time,
# checked all sensors wiring visually, and clean the sensores, terminals and plugs,.....no sign of dirt or corrosion,
# Hook the code reader and got C102A & C1035,
# planing to change these two speed sensors,

My question is, why did these two sensors go bad the same time while the car was sitting on the driveway???,......
Anyone experienced anything like this,
Thanks,

 

I don't know about where you live but here in Central Fla we have problems with insects and mice. I would look for chewed up wireing and insect nests around sensors/air passages.

 

Hi, I live in Toronto, Canada,.....the wires have no sign of damage of any kind and when I took the sensors out, clean the air passages with small painting brush,......I don't think extreme cold can kill the sensors, if it does, I'm lucky,.....just change the sensors,

 

So how did it turn out?

 

I lean towards it being an issue with the battery, because what he just described are the same symptoms as a bad battery.
The 300 c's are really sensitive to battery condition and will run like crap with a bad battery, plus throw false codes.

 

Hi,
I couldn't get help anywhere,
I found a few posts very identical symptoms to mine,.....but all of them didn't mention the conclusion,....couldn't contact with them too,(very old posts)

""everything was fine before parking the car for four months and disconnecting the battery""
I kept telling myself ""extreme cold can not kill both rear speed sensors at once""(as the OBD reader was giving me the codes,

Finally I decided to take the sensors off and with small flash light try to check tone rings inside the sensors-mount cylinder,
Turned the wheel,.....the driver side, magnet was sticking to the cylinder and was not turning with axle, obviously it got separated from the metal ring,.......the passenger side, all I saw was rusted metal ring turning with axle......no magnet,

I ordered the rings from UK,.......haven't received them yet,....

 

Hi to all,
The problem was the Tone Rings,
Cheers,

 

Many thanks for closing this out Fred. You would be surprised how many blokes don't.

Automotive technology has certainly breezed past me. Without a code reader it's most difficult to know even which planet you're on.

 

I know what you mean,

I drove the car about 80k in Limp mode,......the Check-Engine light came on after a little while,......because,...driving with first gear(only) at 2500~3000rpm,....the gas mileage gets to 36~38L/100,....and ECM thinks(beside Transmission&ABS) something wrong with the car.

After Tone Rings installations,.....less than 100meter of driving,......all the ABS and Traction Control lights went off,.....but Check-Engine light is still on,
I think,....I have to drive at least 100k until ECM detects correct gas mileage and shuts the light off,.......or I might ended up turn it off by OBD reader,
Cheers,
---------------------------

Updating;
After driving about 35k, I parked the car and came back after a few hours,.....started the car and the Check-Engine light went off,
Cheers,