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Check engine light shut off

  #1  
Old 04-10-2018, 04:55 PM
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Question Check engine light shut off

Check engine light came on, so made an appt at a mechanic shop to get a diagnosis.



Thought it was low power steering fluid, replaced it. Thought it was old, dark motor oil, changed that. Nope.



The manual specifies changing oil every 5k, and Volvo experts say 3k. I let this go for 11k! (But maintained a good level.) My previous longest was 8k.


My own diagnostic box is worthless, thinks the car is fine. I have to wonder if anyone, anywhere gets useful data out of those worthless things.


Two days before shop appt the check engine light went out. Cancelled the appt, reasoning that without fault codes, the shop would not be able to determine what the problem was.


Was I right, or do fault codes get saved?
 
  #2  
Old 04-10-2018, 10:39 PM
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Fault codes are stored.

Change your oil on time.
 
  #3  
Old 04-13-2018, 05:52 PM
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Join Date: Sep 2017
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They should be able to bring up the fault codes. If you don't want to spend the cash on bringing it in, and everything seems to have fixed itself, don't worry about it unless they come on again.
 
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