Fuel Pressure Regulator 1 Control Circuit High
The P0092 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the fuel pressure regulator control circuit. This typically means the circuit voltage is above the expected range, often due to a short to power, a faulty fuel pressure regulator solenoid, or an issue with the ECM itself. The fuel pressure regulator controls fuel rail pressure by adjusting the fuel return flow; a high circuit condition can cause improper fuel pressure, leading to drivability issues.
1. Most Common Causes
- Short circuit to voltage in the fuel pressure regulator control circuit wiring
- Faulty fuel pressure regulator (electric actuator) with internal short circuit
- Corroded, bent, or loose electrical connections in the regulator harness
- Engine control module (ECM) failure (rare, but possible in the internal power driver stage)
- Ground or reference circuit issues causing a high reading due to offset
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine may run rich or lean
- Poor fuel economy
- Rough idle or hesitation
- Possible hard starting
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve the code and freeze frame data.
Step 2: Visually inspect the wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the fuel pressure regulator solenoid resistance and compare to specs.
Step 4: Check for voltage at the regulator control circuit with key on; should be within range.
Step 5: If wiring and solenoid are okay, test the ECM output or replace the ECM.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as improper fuel pressure can cause engine damage or poor performance. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the ECM needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.