Question about 2005 Ford Mustang
Temp guage stays on cold and engine warning light is on
You more than likely have a thermostat that is stuck open. When this is the case with the computerized vehicles today the computer tells your engine that it is still cold and dumps more fuel to the engine. When this happens the extra fuel goes through your exhaust and uaually makes the check engine light come on as you have O2 sensors that register this flow. Replace the thermostat, disconnect the negative side of your battery for 5 minutes and re-connect. If this has been going on for a while the light may come back on. You may have to drive it for a while until it clears all the excess fuel out of the system then do the battery thing again. You probably have been getting poor gas mileage as well. Hope this helped. Just make sure that the engine light does not flash as this is a sign of major problems and you should not drive it if it flashes
Posted on Feb 06, 2010
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Posted on Jan 02, 2017
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