P2293
Fuel Pressure Regulator 2 Performance
The high-pressure fuel pressure regulator (volume control or pressure control valve on a direct-injection rail) is not maintaining commanded pressure. Often the rail-pressure sensor reading drifts away from the setpoint under load.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Common causes
Ordered by how often each turns out to be the cause.
- Pressure regulator worn or stickingCommon
- High-pressure pump weakPossible
- Rail pressure sensor driftLess likely
Parts involved
- Fuel Pressure Regulator
- High Pressure Fuel Pump
- Rail Pressure Sensor
P2293 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.