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low engine pressure

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Symptoms of a Bad or Failing Manifold Absolute Pressure Sensor (MAP Sensor)
Common signs include excessive fuel consumption, lack of power, and failing an emissions test.

Related questions

Question
Had a Low Engine Pressure light and now the car won't start.
The low pressure light is your oil pressure for the engine and if you loose the oil pressure to all the internal bearings can cause major engine damage. You will need to have your engine checked to see if this...
Question
Check Engine light on; engine revs and has reduced power
Your 2003 Envoy seems to have quite the variety of symptoms, and these could indicate a variety of problems. The smell of gas may be due to a fuel leak or may be an issue with the EVAP system. Or...

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