P023F

Fuel Pump Secondary Circuit/Open

Q: Is it safe to drive with P023F?

No — an open pump circuit can cut fuel delivery and leave you stranded. Diagnose and repair it before depending on the vehicle.

Q: Can I just clear P023F?

Clearing won't restore fuel delivery. If the circuit is open the pump won't run, so the fault and the driveability problem return immediately.

Fuel delivery Generic OBD-II High

What it means

P023F means the ECM has detected an open (broken) circuit in the fuel pump's secondary control wiring. If the circuit is open the pump can't be switched on, so the engine may crank without starting or stall and fail to restart. A blown fuse, broken wire, or failed relay in the pump control circuit is the typical cause.

High

Can I keep driving? Often not drivable — an open pump circuit can stop fuel delivery entirely, causing stalling or a no-start. Have it fixed before relying on the car.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Crank-but-no-start condition
Sudden stalling
Hard starting

Common causes

Most likely first

Blown fuel-pump fuseLikely
Open or broken wiring in the fuel-pump control circuitCommon
Failed fuel-pump relayCommon
Faulty fuel-pump (driver/control) moduleLess often
Internal ECM fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data, then check the fuel-pump fuse and replace if blown (and find why it blew).
Inspect the pump control wiring and connectors for opens, corrosion, or backed-out pins.
Test the fuel-pump relay and confirm it receives its control signal.
Verify voltage reaches the pump when commanded on; repair the open in the circuit.
Suspect the pump control module or ECM only after fuse, wiring, and relay are confirmed good.

FAQ

Quick answers

Is it safe to drive with P023F?+

No — an open pump circuit can cut fuel delivery and leave you stranded. Diagnose and repair it before depending on the vehicle.

Can I just clear P023F?+

Clearing won't restore fuel delivery. If the circuit is open the pump won't run, so the fault and the driveability problem return immediately.

Read & clear P023F yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX