Archived HELP! Code p0237 & P0112

[NM_DSLMan]

Truck ran fine on way to work this morning. Went out for lunch and it was bucking and jumping when I get on the throttle. Boost will not go over 4psi. Checked codes in odometer window: p0237 and p0112. Hooked it up to an snap on scanner and it is reading a battery voltage of 12. 7 and ECM reads 14 volts. IAT voltage is reading 0 volts. Question is where do I need to start? AIT replaced 12,000 miles ago. Can this go bad so soon. Would a bad MAP sensor cause an IAT to not read correctly? Any help will be appreciated. Thanks

 

[nps]

With those codes it sounds like:

1. Fuse problem? (don't know which one - check them all under the hood and in the dash).

2. Loose connector?

3. ECM took a dump.

 

[johncameron]

P0112 (M) Intake Air Temp Sensor Voltage Low Intake air (charge) temperature sensor input below the minimum acceptable voltage



P0237 (M) Map Sensor Voltage Too Low MAP sensor voltage input below the minimum acceptable voltage.

 

[NM_DSLMan]

Changed MAP and IAT sensors and truck still doing the same thing. Could my VP44 be out?

 

[NM_DSLMan]

Update: All grounds were checked, MAP and IAT were working but when the truck was started the ECM was not reading the voltage from them. Truck had a bad ECM and was replaced with a dealer purchased ECM. Truck runs great now. ECM must have been going out slowly over time. Thanks for all the help.