Fuel Pump Secondary Circuit/Open
The P023F code indicates a problem in the fuel pump secondary circuit, which typically refers to the circuit that controls the fuel pump relay or the fuel pump itself. This can be caused by an open circuit, short circuit, or excessive resistance in the wiring, connectors, or the fuel pump relay. The fuel pump may not receive proper voltage, leading to insufficient fuel pressure or no fuel delivery.
01. Most Common Causes
- Faulty fuel pump relay
- Open or shorted wiring in the fuel pump circuit
- Blown fuse
- Corroded or loose connectors
- Failed fuel pump
02. Symptoms You Will Notice
- Engine cranks but does not start
- Loss of power or hesitation during acceleration
- Engine stalling
- Check Engine Light illuminated
03. Step-by-Step Diagnosis
Step 1: Check for blown fuses related to the fuel pump circuit.
Step 2: Inspect wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the fuel pump relay for proper operation using a multimeter.
Step 4: Verify voltage at the fuel pump connector; if no voltage, trace the circuit back to the relay.
Step 5: If voltage is present, test the fuel pump resistance and ground; replace if out of spec.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The vehicle may stall or fail to start, potentially causing a dangerous situation.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the fuel pump needs replacement.