2009 Chevrolet Cobalt Ignition interlock

2009 CHEVROLET COBALT
108,000 MILES
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KALYA
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  • 2 POSTS
While driving on the fwy at 80mph a light came on that said engine reduce power then traction loght and check engine light came on. After i parked the car for a few hours the all the lights including check engine light turned off but this problem continues to gappen when i reach a speed around 80mph.
Jul 13, 2013 at 10:30 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
When this happens and the lights are on, take the vehicle to a nationally recognized parts store and have them scan the computer for codes. It should indicate where the problem is coming from.
Jul 13, 2013 at 8:20 PM
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KALYA
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  • 2 POSTS
The code it reads is p0641
Jul 15, 2013 at 12:13 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
P0641 Sensor Ref Voltage A Circ/Open

That is the only info I can find on this code. It is extremely vague
Jul 15, 2013 at 8:42 PM
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