Check engine light - GMC Terrain Forum : GMC Terrain Forums
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Old 01-21-2017, 07:08 PM   #1
DPK
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Exclamation Check engine light

Out of the blue...I went to start the car yesterday morning like any other morning and it started funny...I had a "Check Engine Light", and messages on the DIC that read.."Engine Power Reduced", "Service Traction Control", and "Speed Reduced to 25 MPH"..After starting and restarting and driving it around in limp mode 3 or 4 times..all that went away on the 4th restart, but the "Check Engine Light" stayed on...And it drove normal

It's in the shop right now..we'll see what they say..
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Old 01-24-2017, 05:43 PM   #2
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UPDATE:

Dealer found that the ECM had developed an internal fault and they ended up having to replace it...All is well again.
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