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Discussion Starter #1
U0416 = Invalid Data received from vehicle dynamics control module
C0215 = Left Rear speed sensor

I switched Left front & rear speed sensors - still same codes. Then I replaced the rear speed sensor wiring harness - still same codes. The rear sensor had alot of grease or oil on it and has a strong fluid smell, the front didn't. I read on another thread that it may be the wheel bearing or axle seal leaking and clogging up the speed sensor and gear it reads from. Any thoughts what it could be or what I should try next?

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Update: went to Dealership to have fixed. It was the rear bearing, not a cheap fix. $1,100. I have 80k miles on my truck and often haul heavy loads in the bed (sometimes exceeding the payload limits for short distances). the mechanic said the bearings usually fail in pairs so the left side won't be far behind.
 
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