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Old 12-30-2009, 09:21 PM   #1
MarkNYC
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Unhappy Hoses, Coolant, Thermostat and Sensor replaced. Now get Service Engine Soon light

I just had a coolant service done on a 2001 Montana with 84,000 miles. It was the first time the system was flushed and filled since I bought it new. Temp gauge was not working but all was fine. I figured sensor was bad. Had trusted mechanic perform coolant servie and change hoses clamps and t-stat. Labor to change t-stat was over 3.5 hours due to its location and the fact that exhaust components had to be removed to get at it. After driving vehicle 5 minutes, the 'service engine soon' light came on. I don't know what the code is yet, but I sure hope it is a minor issue.

Any guesses as to why coolant servicing would cause a code to appear?
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Old 12-31-2009, 02:53 PM   #2
dewaynep
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Re: Hoses, Coolant, Thermostat and Sensor replaced. Now get Service Engine Soon light

Could have left a sensor or 2 unplugged?
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Old 12-31-2009, 03:12 PM   #3
danielsatur
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Re: Hoses, Coolant, Thermostat and Sensor replaced. Now get Service Engine Soon light

I wouldn't guess yet! ,the P-code will tell you what sensor was forgotten.
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