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1998 BMW 328IS E36
2.8L I6 M52•RWD•AUTOMATIC•gas
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Repairs0Labor494Torque2174Fluid8DTC1210Battery1Maintenance0Recalls0
P0231high severityPowertrain

Fuel Pump Secondary Circuit Low

on 1998 BMW 328is E36 2.8L I6 M52 · RWD

What this code means

Low voltage in the fuel pump secondary (output) circuit.

Symptoms

  • Engine stalling
  • No start
  • Loss of power at high RPM

Common causes

  • Fuel pump failing
  • Corroded connector
  • High resistance wiring
  • Weak battery during cranking

Diagnostic steps

  1. Test voltage at pump connector
  2. Check connector
  3. Measure current draw

Repair notes

Replace fuel pump or repair wiring.

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