Is there a way to check the PCM because I've also been having problems. I just got this code, but it is a new sensor also, I changed all of the sensors over the past month because the truck was running shoddy at low RPMs, so I replaced the IAT, ECT, O2 upstream sensor, as well as replaced the catalytic converter, plugs (several times), wires, ignition coils, intake and exhaust gaskets, I'm kinda running out of ideas, and I thought that the fact this code appeared may indicate a PCM problem. Each of the things I did has helped a lot from where I began, but I still feel like the truck is getting too much fuel when the AC is on. It seems to run almost perfect with the AC off.

 

I have 5 codes showing at once and i was wondering if one might be setting off all of the others? The codes for are P0113, P0102, P1121, P0172, and P0125. My truck was idling at 2500 rpms, about 40 mph but when i would go to hit the gas it would bog out. Now its back down to around 1000 rpm's but still bogging out when i hit the gas. any ideas?

 

P0113 Intake Air Temperature (IAT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The IAT sensor maximum is 4.6 volts or -50 C (-58 F). Possible causes are Open circuit in harness, Sensor signal short to power, Damaged Sensor, Improper harness connection, Damaged PCM

P0102 Mas Air Flow (MAF) Circuit Low Input, The MAF sensor circuit is monitored by the PCM for low air flow (or voltage) input through the comprehensive component monitor (CCM) If during key ON engine running the air flow (or voltage) changes below a minimum calibrated limit, the test fails. Possible causes are MAF sensor disconnected, MAF circuit open to PCM, VPWRopen to MAFsensor, PWR GND open to MAF sensor, MAF RTN cirbuit open to PCM, MAF circuit shorted to GND, Intake air leak (near MAF sensor), A closed throttle indication, Damaged MAF sensor, Damaged PCM.

P1121, Throttle Position (TP) Sensor Inconsistent with MAF Sensor, The PCM monitors a vehicle operation rationality check by comparing sensed throttle position to mass air flow readings. If during key ON engine running self-test the comparison of the TP sensor and MAF sensor rreadings are not consitent with calibrated load values, the test fails and a diagnostic trouble code is stored in continuous memory. Possible causes are Air leak between MAF sensor and throttle body, TP sensor not seated peoperly, Damaged TP sensor, Damaged MAF sensor.

P0172, System to Rich (Bank 1) The Adaptive Fuel Strategy continuously monitors the fuel delivery hardwar. The test fails when the adaptive fuel tables rich a lean calibrated limit. Possible causes are Fuel system, Excessive fuel pressure, Leaking/contaminated fuel injectors, Leaking fuel pressure regulator, Low fuel pressure or running out of fuel, Vapor recovery system, Induction System air leaks after the MAF, Vacuum Leaks, PCV system, Impoperly seated engine oil dipstick, EGR system, Leaking gasket, Stuck EGR valve, Leaking diaphragm or EVR, Base Engine problems.

P0125. Insufficient Coolant Temperature for Closed Loop Fuel Control,Indicates the ECT or CHT sensor has not achieved the required temperature level to enter closed loop operatin conditions within a specified amount of time after starting engine, Possible causes are Insuficient warm up time, Low engine cooolant level leaking or stuck open thermostate, Malfunctioning ECT sensor, Malfunctioning CHT sensor.

So check for vacuum leaks and let your engine warm up.

 

thanks man