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P0231

Fuel Pump Secondary Circuit Low

1992-1996 BMW 318is E36 1.8L I4

High SeverityPowertrainGeneric (SAE)

Description

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.

Related Codes

P0230Fuel Pump Primary Circuit MalfunctionP0232Fuel Pump Secondary Circuit High

Other Powertrain Codes

P0231 on Other Vehicles

Common Questions

What does code P0231 mean on a 1992-1996 BMW 318is E36?

P0231 stands for "Fuel Pump Secondary Circuit Low". Low voltage in the fuel pump secondary (output) circuit.

What are the symptoms of P0231 on a BMW 318is E36?

Common symptoms of P0231 include: Engine stalling, No start, Loss of power at high RPM.

What causes P0231 on a 1992-1996 BMW 318is E36?

Common causes of P0231 include: Fuel pump failing, Corroded connector, High resistance wiring, Weak battery during cranking.

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