All codes
P0230Fuel System
Fuel Pump Primary Circuit Malfunction
Fix P0230 fuel pump primary circuit code - relay, wiring, and fuel pump control module causes and solutions.
What you may notice
Symptoms
- 01Check engine light on
- 02Engine cranks but doesn't start
- 03Intermittent stalling
- 04Fuel pump not running or running erratically
- 05No fuel pump priming sound at key-on
Where to look first
Common causes
- 01Failed fuel pump relay
- 02Blown fuse in the fuel pump circuit
- 03Damaged or corroded wiring/connectors
- 04Faulty fuel pump control module (on vehicles with one)
- 05Failing fuel pump drawing excess current
Step by step
What to check and repair
- 01Test and replace the fuel pump relay
- 02Check the fuel pump fuse
- 03Inspect wiring harness for damage, especially near the tank
- 04Test the fuel pump control module if equipped
- 05Test fuel pump current draw against spec
What Does P0230 Mean?
P0230 means the ECM detected a problem in the fuel pump primary control circuit - the wiring, relay, or driver that switches power to the fuel pump. It's an electrical fault, not necessarily a worn-out pump.
Why It Can Be Serious
Because this circuit controls whether the pump runs at all, this code can accompany a no-start or a sudden stall while driving if the circuit fails completely.
How AI4Car Helps
AI4Car can log when this code sets relative to engine load and driving conditions, and track fuel pressure trends, helping distinguish a relay/wiring fault from an actual failing pump.