Just as I got into work the check engine light came on. Not a big deal, just brought out the lap top computer, cleared the codes, and went back to work. The same code showed up on the way back home. The code was 0519 - Manifold absolute pressure sensor circuit open/short to ground.
The repair manuel said to look at the baro pressure and MAP sensor with the ignition on, but the motor off. The two should be the same. The MAP sensor was about 150 mbar (2.2 psi) low. A good cleaning brought it up so that it is now about 100 mbar low. Must just be within tolerance because the check engine light no longer turns on.
Given that most cars that a factory turns out are average, a few real dogs, and fewer yet very good. I must have one of the very good ones. The techs at the dealership have commented on how strong it runs compared to the others.
This check engine light has given me the opportunity to snoop a bit. What I have found is that the MAP sensor is low, which makes the boost higher by about 2 psi. The MAF (mass air flow sensor) is reading high, which makes for more fuel. The combination of more boost with more fuel makes more horse power.
Does this sound reasonable?
Now that the MAP sensor is back within tolerance, should it be left alone?
The repair manuel said to look at the baro pressure and MAP sensor with the ignition on, but the motor off. The two should be the same. The MAP sensor was about 150 mbar (2.2 psi) low. A good cleaning brought it up so that it is now about 100 mbar low. Must just be within tolerance because the check engine light no longer turns on.
Given that most cars that a factory turns out are average, a few real dogs, and fewer yet very good. I must have one of the very good ones. The techs at the dealership have commented on how strong it runs compared to the others.
This check engine light has given me the opportunity to snoop a bit. What I have found is that the MAP sensor is low, which makes the boost higher by about 2 psi. The MAF (mass air flow sensor) is reading high, which makes for more fuel. The combination of more boost with more fuel makes more horse power.
Does this sound reasonable?
Now that the MAP sensor is back within tolerance, should it be left alone?
