P123A FORD Possible Causes
- Faulty barometric pressure sensor (BARO)
- Barometric pressure sensor (BARO) harness is open or shorted
- Poor electrical connection in the barometric pressure sensor (BARO) circuit
- Faulty supercharger (SC) pressure sensor “A”
- Supercharger (SC) pressure sensor “A” harness is open or shorted
- Poor electrical connection in the supercharger (SC) pressure sensor “A” circuit
How is the P123A FORD code repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P123A FORD Meaning
The powertrain control module (PCM) monitors the barometric pressure sensor (BARO) and the turbocharger (TC)/supercharger (SC) “A” pressure sensor. The PCM sets the OBDII code when the barometric pressure sensor (BARO) and the turbocharger (TC)/supercharger (SC) “A” pressure sensor do not meet factory specifications.