P0113 Fault Causes A/C Compressor Shutdown in 2010 Ford E-350 5.4L Van?

No other error codes are present. There are many sensors involved in this circuit. I suspect additional fault codes may exist in the P0999 range, which are manufacturer-specific and not always accessible through standard code readers.

Thanks for the reply. I replaced the MAF sensor but still see -29°F for ambient air and -40°F for intake air on my scanner. Is this reading causing the PCM to shut down the A/C compressor? I've already replaced the entire A/C system. While idling at the shop, everything works perfectly with normal pressure readings. However, during a 5-minute test drive, the A/C compressor shuts off completely. Could this point to a faulty PCM?

An IAT reading of -40°F and ambient air at -29°F — yes, these values would trigger the PCM to shut down the A/C compressor. Are there any additional diagnostic codes mentioned in previous posts? I recommend investigating what is causing these abnormal readings. Start by checking for non-Ford original components or aftermarket add-ons.

In addition to P0113, two other codes are present: P0138 and P0453.

Focus on identifying the root cause of abnormal IAT and ambient air readings. Begin by checking for any non-original or aftermarket modifications installed in the vehicle.