Thanks for the post. I’m assuming by rich condition you meant the car threw off a p0172 code. Were you able to identify the cause and resolve it?. Being having thesame issue for which i replaced o2 sensors, plugs, fuel injectors, complete fuel pump and housing, catalytic converter, coolant temperature sensor but still to no avail.

Sorry for the late reply, got carried away with festivities. 🙂
The car is negatively grounded, so I don’t believe the idea of grounding through that bolt holds water. However, it is possible that the missing bolt could affect the quality of the connection of the connector to the MAP sensor or lead to other components interfering with the electrical signals to the MAP. It may also just be that the MAP is bad. In the spirit of being frugal, it’s logical to try to rule a poor connection before going for a new sensor. Not sure what your comfort level is with DIY, assuming you know how to use a multimeter, you could test the sensor.

Hello, thank you for the speedy response. And I should have specified I’m talking about the 10mm bolt holding the positive battery cable to the intake manifold. I was told that it also could potentially act as the grounding wire. I’m not very mechanical and this is all very much so a new learning process for me.

Hi and thanks a lot for reading this post.
From the dealer site (hondapartscheap.com) the size for my vehicle is stated as 5×20. If in the US, you can order from there. Its inexpensive ($0.63). Here’s the link to mine. Change to your exact vehicle since you say, yours is a 10mm bolt. https://www.hondapartscheap.com/oem-parts/honda-screw-washer-5×20
It is possible that a missing screw/bolt could cause a poor electrical connection at the connector thus leading to the code. Is the MAP sensor loose without the bolt? With any code you should rule out poor connection anyway so it doesn’t hurt to start with the bolt first.

Funny you stripped the screw, so did I. Went with needle nose fliers

Hi Bertha,

The MAP sensor is usually located on the intake manifold. Visit the link below, its part number 7

http://www.hondapartscheap.com/auto-parts/2012/honda/accord-sedan/ex-trim/5-speed-automatic-engine/engine-cat/intake-manifold-l4-scat

Thanks Aninta. It didn’t make a change to the rich condition.
LTFT ranges from -5.5% to -7.8% before and after. Since this is less than 10% it’s actually permissible but I’m just troubleshooting to see if I can get it down to less than +or-5%
I really didn’t expect a change since my MAP readings weren’t out of spec. Just satisfied my conscience by ticking this box and knowing it’s not MAP related. Need to check my fuel pressure readings!