What it means
The fuel pressure regulator A control circuit voltage is higher than expected. This indicates an electrical circuit fault; the code alone does not identify the cause.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
Fuel Pressure Regulator A adjusts fuel pressure under the control module's command. The module monitors the regulator's control circuit and sets P0092 when its voltage is higher than expected, which can happen if the wire is shorted to battery voltage or has a poor connection.
Common causes
Most likely first.
- Wiring shorted to battery
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
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
How to diagnose it
- Review freeze-frame data and commanded versus actual fuel pressure to learn when the circuit fault occurred and whether pressure control changed.
- Inspect Regulator A's connector and harness for a pinched supply wire, damaged insulation, corrosion, or loose terminals.
- Check whether the control wire is contacting a battery-voltage source, following the vehicle wiring diagram.
- Test the control circuit for shorts to power and verify connector contact and continuity to the manufacturer's specification.
- If the wiring checks out, test Regulator A and the module's output driver using the manufacturer's procedure.
Common fixes
- Repair a control wire shorted to battery voltage or pinched against a powered wire.
- Clean or replace corroded or damaged connector terminals.
- Replace damaged harness sections and secure them away from power sources.
- Replace Fuel Pressure Regulator A only if testing identifies it as faulty.
Can I keep driving?
Keep driving only if the engine runs steadily and there is no fuel leak; avoid high loads because fuel pressure control may be unreliable. Stop if it stalls, loses power severely, or fuel is present outside the fuel system.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.