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I got a problem with my map sensor in a chevrolet optra, it has a reference volts reading 5.3 but the problem is i cant get a ground reading. Whats probably the cause?
What exactly does it mean "can't get a ground reading"?
If you're measuring reference voltage - around 5 volts - on the ground wire of the sensor then you got an open ground. If you measure anything higher than 0.1 volt but less than 5 volt reference voltage then you're dealing with unwanted high resistance on that very ground connection
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Hi sir, i switched on the car then testing the three wires of the map sensor, one wire has a 5.03 volts so im sure its the reference voltage, ive come up to find the ground wire by testing it with a multimeter (continuity test) the remaining two wires are both not responding or no continuity.
Actually the main problem of this car sir is that it has a dtc P0107 (map sensor low voltage) im just checking the wirings if the problem lies there for i dont want to waste money for a new map which is a little bit costly
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