MAP Sensor -5 volts

Asked by Mar 15, 2008 at 12:06 PM about the 2002 Saturn S-Series

Question type: Maintenance & Repair

I have a 105 code (MAP Sensor).  I replaced and cleared.  Code came back.  The voltage on the sensor is reading -5.  All other sensors are +5.  Smoke tested and no leaks found.

1 Answer

40,235

It's possible you got a bad MAP sensor when you replaced it. Can you get an actual reading of what pressure the MAP sensor is recording? If there is a small crack in the line to it the MAP will read atmospheric pressure instead of actual manifold pressure and throw a code. How are the wires to the MAP sensor, are they intact without any cracks or breaks in the insulation?

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