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2010 SUBARU OUTBACK
3.6L H6•AWD•CVT•gas
18 active safety recalls on this vehicle — view recalls
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Repairs0Labor536Torque4513Fluid8DTC889Battery1Maintenance0Recalls18
P1230high severityPowertrain

Fuel Pump Control Unit Malfunction

on 2010 Subaru Outback 3.6L H6 · AWD

What this code means

The PCM has detected a malfunction in the fuel pump control unit. The module that controls fuel pump operation is not functioning correctly, which can result in no fuel delivery or incorrect fuel pressure.

Symptoms

  • Check Engine Light
  • Engine cranks but will not start
  • Engine stalls while driving
  • Intermittent power loss
  • No fuel pump prime sound on key-on

Common causes

  • Faulty fuel pump control unit
  • Wiring issue between PCM and fuel pump controller
  • Fuel pump relay failure
  • Corroded fuel pump connector
  • PCM communication issue with fuel pump module

Diagnostic steps

  1. Listen for fuel pump prime when key is turned on
  2. Check fuel pump relay operation
  3. Test fuel pump control unit power and ground
  4. Inspect wiring between PCM and fuel pump controller
  5. Test fuel pressure at the rail

Repair notes

Replace the fuel pump control unit if it is not operating the fuel pump correctly.

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