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speedometer sticks between 20 and 60 mph then will start functioning again after a day or two. car has 60000 mile on it.
2 Replies
Seems like one of two things is occuring: Your vehicle speed sensor (VSS) is failing intermittently causing a false speed reading. Or, the instrument cluster has an internal issue. This vehicle does not utilize a speedometer cable, but rather relies on a sensor to provide speed to both the engine's computer (PCM) and the instrument cluster.
This is pretty common on the 2005 Mustangs, it's caused by failing stepper motors in the instrument cluster, they control the movement of the gauges. There's a guide on how to fix them here - www.2005-mustang-speedometer-problem.com