Home›Trouble Codes›P0092

P0092 — Fuel Pressure Regulator Control Circuit High

Generic OBD-II · all makesPowertrain (engine & transmission)

P0092 sets when the powertrain control module detects voltage on the fuel pressure regulator control circuit that is higher than specified. This electronic regulator adjusts fuel pressure to the injectors, and a 'high' reading usually points to a short-to-power condition or a fault within the regulator circuit rather than an actual overpressure event.

Symptoms

What causes it — most likely first

1. Short to power in the regulator control wiring

The control wire may be chafed, pinched, or melted against a voltage source, feeding battery voltage back into a circuit the PCM expects to pull low. This is the most common electrical fault behind a 'circuit high' code.

2. Faulty fuel pressure regulator solenoid or actuator

An internal short or open coil inside the regulator can cause abnormal resistance and voltage readings. Testing the solenoid resistance and command response will usually reveal the failure.

3. Corroded, damaged, or loose connector at the regulator

Poor terminal contact, water intrusion, or backed-out pins can create high-resistance or voltage-drop issues that the PCM interprets as a high-circuit condition.

4. Open or compromised ground/reference circuit

If the regulator's ground or reference path is degraded, the control circuit voltage can drift high because the return path is incomplete or resistive.

5. PCM driver or internal circuit fault

The PCM output driver that controls the regulator could fail, but this is uncommon. It should be considered only after the wiring, connector, and regulator solenoid have been ruled out.

How it's diagnosed

  1. Confirm P0092 and record freeze frame data with a scan tool to see under what conditions the code set.
  2. Visually inspect the regulator wiring harness and connector for chafing, pin damage, corrosion, or contact with exhaust or moving components.
  3. With the key on and engine off, measure voltage on the regulator control circuit and compare it to manufacturer specifications; check for a short to power or short to another voltage circuit.
  4. Test the fuel pressure regulator solenoid resistance and command it on/off with a scan tool or lab scope to verify it responds correctly.
  5. If all circuits and the actuator test normal, evaluate PCM output on the control circuit and consider module replacement only as a last resort.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationSAE generic — identical on every make
Related codesP0090 — Fuel Pressure Regulator Control CircuiP0091 — Fuel Pressure Regulator Control CircuiP0093 — Fuel System Leak Detected Large LeakP0094 — Fuel System Leak Detected Small LeakP0095 — Intake Air Temperature Sensor 2 CircuiP0096 — Intake Air Temperature Sensor 2 Circui

Frequently asked

Is P0092 the same as a fuel rail pressure sensor code?

No. P0092 refers to the fuel pressure regulator's electrical control circuit, while fuel rail pressure sensor issues are usually stored as P0190 through P0194.

Can I keep driving with a P0092 code?

Limited driving may be possible, but incorrect fuel pressure can lead to stalling, hard starting, or lean/rich conditions that may damage the engine or catalyst. Diagnosis should be done promptly.

Should I replace the PCM first when I get P0092?

No. PCM failure is an uncommon cause of this code. Most instances are resolved by repairing a wiring short, cleaning or replacing a connector, or replacing the fuel pressure regulator solenoid. The PCM should be suspected only after all circuit and component testing is complete.

Can a bad battery or charging system cause P0092?

Extreme system voltage outside normal range can sometimes trigger circuit codes, but it is not a typical cause. Verify charging system voltage is normal before replacing parts.