Powertrain, generic (extended)

P2DA8 DC/AC Converter Control Module A Switch A Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

DC/AC converter control module A is the inverter that turns direct current from the vehicle battery into household AC for sockets in the vehicle; Ford calls it DCACA and uses it for Pro Power Onboard on the F-150, where TSB 21-2127 handles a related fault, P0364 in the PCM. P2DA8 reports an electrical fault – open, short or no valid signal – in the circuit of switch A of this module. J2012 does not say what switch A is. In Ford's patent US11043801B2 the DCACA controller switches each socket group on and off through relays and can also read a manual button in the bed or cab; comparing voltages ahead of and behind the switch tells it whether the switch works. No manufacturer documents P2DA8 publicly. The affected outlets stay dead; driving is not affected.

Likely causes

Open or shorted wire or corroded connector between switch A and the module
Switch A or its relay failed
Water ingress at an outlet panel in the bed or cargo area
Internal fault of the DC/AC converter module

Symptoms

  • AC outlets of group A without power
  • Message that onboard power is unavailable
  • Outlet button without reaction

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dcac converter module a switch awiring harnessdc ac converter module a

Related codes

P2DA9P2DAAP0364U0288

References: patents.google.com, static.nhtsa.gov, law.cornell.edu.