Hi! I am new to the forum and fairly new to working on Hondas. I have a 2002 Honda Accord with a 4 cyl. The other day it would not start easily. After it did finally start it ran extremly rough and died. Check engine light was on. I pulled up a code P0108 map sensor. I bought a new sensor and replaced it. The car started fine, took it for a test drive amd while on my test drive after it warmed up (about 3 miles) the check engine light came back on. I went home, and pulled the code P0131. My concern is there is something else wrong besides changing out every sensor in this car. Anybody have any ideas or thoughts? Thanks in advance!

 

The higher the engine vacuum, the lower the voltage reading. The voltage should range between about 1 volt (at idle) to about 5 volts (WOT wide open throttle).

If the PCM sees the voltage reading from the MAP sensor is greater than 5 Volts, or if the voltage reading is higher than what the PCM considers normal under certain circumstances, a P0108 DTC will set.

Potential causes of a P0108 code:
•Bad MAP sensor
•Leak in vacuum supply line to MAP sensor
•Engine vacuum leak
•Short on signal wire to PCM
•Short on reference voltage wire from PCM
•Open in ground circuit to MAP
•Worn engine causing low vacuum

Found this on obd-codes.com

I say check the wiring harness at the map sensor all the way to the ecu.... If you look behind the sensor clip on the wiring harness the wires in the back could be loose or broken

ALSO MAKE SURE YOU WRITE DOWN ALL THE CODES BEFORE YOU CLEAR CHECK ENGINE LIGHT!
SO YOU KNOW ALL YOUR PROBLEMS...

 

Thanks! I will check all this out and see what I come up with!