P2294
Fuel Pressure Regulator B Control Circuit/Open
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.
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.
Related codes
Often seen with P2294
Read & clear P2294 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX