Hi I posted this on the drive train forum and got no replies, so I hope some one could help me here. This is the problem.

I was driving my truck today, and it started to do some funny stuff!! at times it felt almost like a dead pedal but not quite. I limped home and put on my Snap-On scaner and got these codes.

P1488 Auxiliary 5 volt sensor feed is sensed to be below an acceptable limit.

P0122 APPS voltage input below the minimum acceptable voltage.

P0522 Oil Pressure sending unit (sensor) voltage input below the minimum acceptable voltage.

I followed the trouble shooter for these codes and it said to replace the MAP sensor.

My voltage going to all the sensors have the required 5 volts and the grounds look good. I tested at the ECM pin 10 also for the 5 Volts and pin 11 for the sensor ground and those checked fine.

On the Data menu I have a Map voltage of 2.3 Volts running or not, OPS of 100 PSI and 0.0 Volts running or not, APPS of 0% all the time

How would a map sensor cause the other codes?

My Gut reaction is the ECM took a Big Dump!!

Have any of you had any simular issues? Thanks Brent

PS It is still the same with or without the comp, and with and without the MAP pluged in.

Thanks again Brent

 

My suggestion would be, have Bob Wagner get in touch with Marco from Mads Electronics.

 

Update

Got a new MAP sensor today and installed it, cleared the codes still came up with all the codes before I even started it