Powertrain, generic (extended)

P2CA0 Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too Low

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2CA0 is the low-pressure verdict for regulator D. GM bulletin 24-NA-106 names it as a bank 2 low-pressure fault on the 2023–24 Corvette with the 5.5 L LT6 and links it, together with P228C, P01BF, P312B and several injector high-side codes, to an incorrect twelve-pin inline plug with an unsealed cavity that admits water to the bank 2 injector wiring; the fix is inspecting the connector part number and, if wrong, renewing harnesses and the rail sensor. GM's tables 23OBDG07/24OBDG07 list P2CA0 with a filtered deviation beyond minus 3 MPa held for 7 s, one trip, a sign that in the same table belongs to overpressure code P228D. Expect stumbling, misfire-like running and the MIL.

Likely causes

Incorrect 12-way in-line connector admitting water to the bank 2 harness (GM 24-NA-106)
Weak bank 2 high-pressure pump or its quantity valve stuck
Bank 2 rail pressure sensor faulty
Insufficient feed pressure from the tank pump

Symptoms

  • MIL on after one trip
  • Stumbling or misfire-like running
  • Several bank 2 injector or rail sensor codes at the same time

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–2,000
Time1–6 h

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

Parts involved

fuel pressure regulator dfuel rail

Related codes

P2C9FP2C9EP2C01P228CP01BFP0087

References: static.nhtsa.gov, gsi.ext.gm.com, gsi.ext.gm.com.