The map sensor is just a credit card sized sensor that has a plug in the middle and two bolts holding it in place on either side. It is very simple to replace and is usually around the upper intake somewhere, possibly with small vacuum hose(s) going to it. Just unhook the battery before replacing.
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Somewhereit is on side of throttle body, at the throttle plate.
check coolant sensor float most common problem.
Its the Primary o2 Sensor (pre-cat), needs to be replaced
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if you do it yourself,you only pay for sensor!! to change sensor on a v6, remove power steering pump and set aside do not remove hoses,sensor is under pump!! remove hold down bolt then wiggle it out!!
map sensor 2000 malibu location
raise the vehicle,disconnect the electrcal connection from the vss. remove the mounting bolt and withdraw the vss from the transaxle case. replace sensor "O" ring.
the upstream o2 sensor is mounted in the exhaust before the catalytic converter and the downstream sensor is after the cat. conver.