Everytime I break the tires lose in my 98 MN6 I get a check engine light that references two PCM codes. I normaly I can figure out what is wrong and fix the problem but this one has me stumped. I get a P0102 and P0103 at the sams time. High AND low frequency at the same time,,, what gives with that???????
It was recommended that I check the fuel cap to see if it is on tight. It is and sealing just fine. Does this mean that I have a bad MAF?
The engine runs excellent and there is no loss of power when the code/s set.
It's just aggervating to get it.

Any insight on how to fix this one will be appreciated!

 

DTC P0102
Diagnostic Aids
Inspect for the following conditions:

A misrouted harness. Inspect the MAF sensor harness in order to ensure that it is not routed too close to the following sensors or components:
a) The ignition coils
b) Any solenoids
c) Any relays
d) Any motors
A low minimum air rate may cause this DTC to set during deceleration. Inspect for the following conditions:
a) A plugged or collapsed intake air duct or a dirty air filter element
b) Objects blocking the MAF sensor air inlet screen
c) Throttle bore and throttle plate deposits
A wide open throttle (WOT) acceleration from a stop should cause the MAF display on a scan tool to increase from about 4-7 g/s at idle to about 190 g/s or more at the time of the 1-2 shift. If not, inspect for a restriction.
Any unmetered air entering the engine may cause this DTC to set. Inspect for vacuum leaks anywhere downstream of the MAF sensor.

DTC P0103
Diagnostic Aids
Water entering the air intake system that reaches the MAF sensor could cause this DTC to set. The water rapidly cools the hot sensing elements in the sensor causing a false indication of excessive air flow. Inspect the following areas for evidence of water intrusion:
a) The secondary air injection (AIR) system
b) The air induction system
A poor connection in the ignition 1 voltage circuit of the MAF sensor can cause a DTC P0103 to set.

"Any unmetered air entering the engine may cause this DTC to set. Inspect for vacuum leaks anywhere downstream of the MAF sensor. "

This seems to be one of the more popular issues that I have seen here on the forum. Hope this helps :cheers:

 

THANK YOU VERY much for the info. I will inspect everything and post the results.. God I love this FORUM :thumbs: :thumbs:

Thanks again

Bill

 

MYSEA5
Wow,,,, I'm impressed! :thumbs: You hit the nail on the head with both problems! I removed the entire air box, MAF and bridge. I found that the inside of the air box was full of ice :eek: ! There was one inch of solid ice behind the filter and the K&N had some ice on it. I can imagine that when the weather was warmer that the water migrated to the MAF. The other problem was that the MAF side of the air bridge was not connected fully. :thumbs:

I dethawed the filter, cleaned everything up, connected everything up PROPERLY and took it for a good hole shot. WHOOOOOOOOO WHOOOOOOOOO did it run good. No codes!!!!!!!!

Man your the greatest!!!!!!!!!!!!

Thanks a MILLION!!!

Bill :cool:


[Modified by Bill Curlee, 12:42 AM 1/5/2003]