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Sometimes car will run rough od light will come on car and it won't switch from off to on could it be od switch not working trans will go to lower gear took it to dealer they have no clue how to fix?
Wiki User
∙ 16y ago
You don't mention what make or model your vehicle is, but some have a Transmission Range Sensor (TRS or DTRS) that will affect the overdrive and downshifting of the transmission. It is located on the side of the transmission and any misalignment of the sensor will cause those symptoms. However, I don't think that same sensor will make the engine run rough - but it certainly affects as mentioned above. If the SERVICE ENGINE LIGHT is ON, or has come ON lately, have it diagnozed, I am sure you will find the problem.
Wiki User
∙ 16y ago
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Why is my 1992 Chevy truck heater switch not working?
Sometimes switches wear out, which could be the reason the switch in your 1992 Chevy truck is not working. There could also be a problem with the wiring. You may also want to check the fuse for the blower to see if it's bad.
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If a 2000 Grand Am sometimes has the heater blower working and sometimes it won't, the problem could be with the heater relay switch. The heater relay switch lets the heater blower know when to come on and when to go off. In most vehicles this switch is behind the glove compartment. This part sometimes gets corroded from condensation in this area.
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Could be low on freon,
