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I would get one and look at your o2 sensors. The pre cat sensor(s) should fluctuate between .1 and .9 volts. If they are, then the car isn’t registering a lean condition. I’m trying to think how a MAP sensor reading low would make your car hard to start, because I’m really tired, and my brain is missing on all cylinders atm. I suppose if it was reading low air pressure during cranking, it might be starving the car of fuel at start up… You could look at the map sensor’s vacuum line and check it for cracks. You could also put a vacuum pump on it and watch the live data to see if the voltage increases at a steady rate as you apply vacuum to it. That’s all I got for you tonite bro. Like I said, I’m beat.
It looks like it specifically applies to the MAP sensor. How does the engine run? Do you have a scanner with live data?
Edit: Welcome to the forums btw! 🙂
Wow thanks for the fast reply! Yes it runs great, one thing i have noticed is it is hard to start. I dont have a scanner but I can get my hands on one if need be.
That code is for a MAP sensor signal and has nothing to do with the O2. Honestly it’s not common that I see that code but here are some things to check. The sensor is located on the top of the throttle body and has a 3 wire connector, first make sure it’s connected and that there is no damage to it, if it’s OK then you might want to check for vacuum leaks, here’s a video on how to do that.
http://www.youtube.com/watch?v=9CPqbaSgcok
If you don’t find any (and I’m not sure you will) you’ll need to get your hands on a bidirectional scanner capable of reading live data, the parts story MIGHT have this type of reader. Once you have it connected I’d like for you to check the MAP sensor reading and compare it to the BARO sensor reading, (KOEO) Key On Engine Off both readings should be the same and within only a couple of decimal points of each other, if the MAP reading is off then I would consider replacing the sensor with an OE unit, I don’t recommend aftermarket parts for this. One last thing is that you might want to remove the sensor from the top of the intake and when you do take a good look at the ‘O’ ring that seals it to the manifold, if it’s damaged then replace it and see if the code comes back, if not then you may have found the problem and you won’t have to replace the sensor. I can’t stress enough how this is not a common problem and whenever I’ve run into it it’s usually some outside force that has caused the issue and not often the sensor itself.
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