Error code

OBD2 P0230

OBD2P0230
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Pump Primary Circuit.

Severity

severeThe vehicle may not start or could stall, making it unsafe to drive.

Summary

P0230 indicates a malfunction in the fuel pump relay circuit, which is part of the vehicle's electrical system responsible for controlling the fuel pump.

Symptoms

  • Engine may not start or stall shortly after starting
  • Malfunction Indicator Light (MIL) illuminates

Common Causes

  • Faulty fuel pump relay
  • Harness damage leading to excessive resistance, open circuit, intermittent open circuit, or short to ground
  • Corrosion or open circuit in the feedback circuit from the ECM
  • Activated inertia switch interrupting power flow through the fuel pump relay and to the ECM monitor

Diagnosis

  1. Check battery voltage (12.6 V with engine off and at least 13.5 V with engine running)
  2. Inspect fuel pump fuse for any blown fuses
  3. Test the relay by swapping it with a known-good relay or bench-testing it
  4. Check resistance in primary and secondary circuits of the fuel pump relay

Fixes

  • Replace faulty fuel pump relay

FAQ

What should I do if my MIL light is on with P0230?

You should check the battery voltage, inspect the fuel pump fuse and relay, and test for any electrical issues in the circuit.

Can a faulty inertia switch cause this code?

Yes, an activated inertia switch can interrupt power flow through the fuel pump relay and trigger P0230.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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