Check Engine Light
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Registered User
Joined: Aug 2010
Posts: 2
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Check Engine Light
I just changed the rear diff oil and replaced it with Royal Purple, and now I have a check engine light on. Is there a possibility that I could have caused that light to come on?
Site Moderator
Joined: Jan 2008
Posts: 8,374
Likes: 28
From: Sioux Falls, SD
Welcome to DF.
Since your only other post is in 3rd gen, I'm assuming you have a 3rd generation (2003-2008) built Dodge Ram, and guessing by your name, you have a diesel.
I will move this to the 3rd gen section for you, hopefully get you some answers. If any of what I assumed/guessed is in error, please PM me and I will move your thread to the appropriate section.
Since your only other post is in 3rd gen, I'm assuming you have a 3rd generation (2003-2008) built Dodge Ram, and guessing by your name, you have a diesel.
I will move this to the 3rd gen section for you, hopefully get you some answers. If any of what I assumed/guessed is in error, please PM me and I will move your thread to the appropriate section.
Hall Of Fame
Joined: Mar 2009
Posts: 19,168
Likes: 23
From: South GA
I seriously doubt changing the oil in the rear diff will cause the CEL to come on. it is likely something else but either way you need to connect a tuner to it and pull the DTC codes or go by an auto parts store and let them connect their OBD scanner to it and pull the codes. Then come back here and tell us what they are.