whats a baro sensor?

[93wagonEX]

ambient pressure is going to be the same in the car as out. cars arent sealed like airplanes to where they can regulate pressure in the cabin. so where the barometric pressure sensor is located is irrelevant. it does the same thing and gives the same reading.

[F22-GURU]

The barometric (BARO) sensor is located in the ECU as owequitit said. Where it is on other cars, who knows. It is inside the cabin, inside the ECU casing.. period. If you pull a trouble code that indicates baro sensor, you must replace the ECU as it is soldered to the circuit board. ....On a sidenote, some ECU's from other countries do not have a baro. sensor. .

Yeah, That's very good mate, but that wasn't the question I asked and I never said the Baro Sensor wasn't inside the ECU.
BTW: I was talking in general terms as that was how the original question was asked. It was not actually asked in context of the CB7.

[owequitit]

However, another very important function for the BARO sensor is for starting. If the BARO sensor indicates high pressures, the ECU can adjust the fuel mixture for a "high-altitude start" so the engine will start easily. On a sidenote, some ECU's from other countries do not have a baro. sensor.

I did forget to mention the starting aspect, so thanks for adding that. Actually though, pressure decreases with altitude, so "low pressure" would trigger a high-altiude start.

ambient pressure is going to be the same in the car as out. cars arent sealed like airplanes to where they can regulate pressure in the cabin. so where the barometric pressure sensor is located is irrelevant. it does the same thing and gives the same reading.

This statement is true, it just made me think of a little interesting factoid (not that anyone cares LOL ) The air pressure outside of a moving vehicle (pretty high rate of speed) is actually slightly higher than the pressure inside the vehicle. It isn't enough to make a difference, but when you are flying an unpressurized airplane and switch to your alternate static pressure source, which is inside the cabin usually, it causes a slightly erroneous indication on the instruments.