I have a 2003 5.9 6 speed throwing one code its a P0237 the truck is in limp mode and I am unable to clear the code it comes back instantly. So far I have cleaned the intake manifold sensor IAT and the pre turbo intake manifold sensor MAF the truck does have 190,000mi so no warranty. This is my only vehicle to get to school 30mi away and to the shop I work at.

Just checked voltage to maf sensor pins were 12v and 7.5 volts does this indicate a bad sensor? Thanks for any help its greatly appreciated!

 

Check your connector at the MAP sensor for corrosion or loose connection, also you may want to ohm out the wires to your MAP sensor just to be sure they're good.

 

It all checked out good no shorts or heavy ohm draw. I cleaned the connectors they look new. All pins were even none looked pushed back.

 

OK so my super chips scan tool only read three of the codes here they all are.

P0237
0480
0602
0483
0107
0073

Now keep in mind i did just rebuild this engine around 2000 miles ago.

 

I checked the codes you listed against my code breakdown list, we both have 2003 year model trucks, so they should be the same:

P0237 - Turbocharger Boost Pressure Sensor Low
0480 - Cooling Fan 1 Control Circuit/Open (Low Speed Fan Relay)
0602 - Control Module Programming Error/Not Programmed
0483 - Cooling Fan Speed
0107 - Manifold Absolute Pressure Sensor Low
0073 - Ambient Temperature Sensor High

This really sounds like an electrical issue, maybe a fuse, maybe a connector, I'm not sure here.

 

Did you find a resolution on this issue?

 

[QUOTE=03 Melt Down;3200382] "2003 5.9 6 speed throwing one code its a P0237 the truck is in limp mode and I am unable to clear the code it comes back instantly. So far I have cleaned the intake manifold sensor IAT and the pre turbo intake manifold sensor MAF"

Did you ever figure out the problem???