P2294

Fuel Pressure Regulator B Control Circuit/Open

Q: Is it safe to drive with P2294?

It may drive normally, but because the ECM has lost control of a fuel pressure regulator the engine can run rough, be hard to start, or stall. Get it diagnosed soon.

Q: Can I just clear P2294?

You can, but this is a circuit fault — it will return until the regulator solenoid or its wiring is repaired.

Fuel delivery Generic OBD-II Medium

What it means

P2294 means the ECM has detected an open in the control circuit for the second fuel pressure regulator (regulator B), so it can no longer command that regulator. Because this affects how fuel pressure is controlled, the engine can run rough, be hard to start, or lose power. The usual causes are a failed regulator solenoid or a wiring/connector fault.

Medium

Can I keep driving? May be drivable but can run rough, be hard to start, or lose power if fuel pressure control is lost — have it checked promptly.

Real-world scan data

Seen in

118

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
Reduced power or hesitation under load
Hard starting or rough idle
Possible stalling if fuel pressure is unstable

Common causes

Most likely first

Failed fuel pressure regulator B solenoidLikely
Open or shorted control wiring to the regulatorCommon
Corroded or loose regulator connectorCommon
Poor ground or supply to the regulator circuitLess often
Faulty ECM driver (less common)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check for related fuel-pressure codes.
Inspect the regulator B connector and wiring for damage, corrosion, or a loose pin.
Measure the regulator solenoid's resistance and check for an open compared to spec.
Verify supply voltage and ground at the regulator connector.
If wiring and grounds are good, replace the fuel pressure regulator. Confirm actual fuel pressure with a gauge, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2294?+

It may drive normally, but because the ECM has lost control of a fuel pressure regulator the engine can run rough, be hard to start, or stall. Get it diagnosed soon.

Can I just clear P2294?+

You can, but this is a circuit fault — it will return until the regulator solenoid or its wiring is repaired.

Read & clear P2294 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