Auto Systems and Repair: MAP Sensor

Symptoms of Wear or Failure

  • Check Engine Light may come on and set a MAP sensor code
  • Engine may run roughly or hesitate
  • Poor engine power
  • Poor fuel economy
  • Excessive tail pipe smoke

Related Repair Advice

  • Due to erratic changes in engine vacuum resulting from a poor running engine, an erroneous MAP sensor code may be set
  • Failure to check the MAP sensor vacuum lines, MAP sensor electrical circuit, and the engine mechanical condition may result in a failed repair attempt when diagnosing the MAP sensor