The OBD2 code P0092 indicates a problem with the “Fuel Pressure Regulator 1 Control Circuit High,” signaling that the circuit controlling the fuel pressure regulator is experiencing high voltage. This issue can cause vehicles to intermittently enter reduced power mode, exhibit rough idle, or face a loss of power, often accompanied by the check engine light.
P0092 quick overview
| Meaning | P0092: Fuel Pressure Regulator 1 Control Circuit High |
| Is it serious? | Yes, it can lead to significant engine performance issues. |
| Possible causes | – Damaged or corroded wiring and connectors – Faulty fuel pressure regulator – Problems with the fuel pump – Aftermarket modifications affecting the fuel system |
| How to diagnose? | Inspect wiring and connectors for damage or corrosion. Check the fuel pressure regulator for proper operation. Monitor fuel pressure to compare desired vs. actual levels. Use diagnostic tools like a scope to check for electrical abnormalities. |
P0092 Meaning
A P0092 code means there’s an electrical issue with the part of your vehicle that controls fuel pressure, making it too high. This can make your car run rough or even lose power because the engine isn’t getting the right amount of fuel it needs.
To fix it, mechanics will look at all the wires and parts connected to the fuel pressure system to find where the problem is. Sometimes it’s as simple as replacing a bad connector or fixing a wire, but it might also need a closer look at the fuel pressure regulator or even updating the car’s computer software.
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How to fix P0092 – learn from mechanics
I looked into P0092 service cases at iatn.com website where in the private forums the mechanics seek advice from other mechanics. I looked up a bunch of cases to help you decide how to fix your issue and see what would a real mechanic do to solve it.
Case #1: GMC P0092
Vehicle information
2010 GMC Terrain SLT 3.0L
Issue + repair history
- Vehicle intermittently enters reduced power mode with the check engine light on
- DTCs P0092 and P00C9 consistently set simultaneously
- High pressure fuel pump replaced twice
- High pressure regulator connector replaced
- ECM replaced and programmed with latest software
Other OBD2 Codes + Test Results
- DTC P0092: Fuel Pressure Regulator Control Circuit High Voltage
- DTC P00C9: Fuel Pressure Regulator High Control Circuit Low
Mechanic suggestions
- Monitor fuel pressure desired vs. actual while driving
- Restring circuits from pump to ECM with new terminals and soldered connections
- Use a 4-channel scope to inspect wires at fuel pressure sensor and ECM for abnormalities
- Perform Fuel Pressure Reset procedure and check circuits at regulator with DVOM
- Check for aftermarket HID headlamp kit or LED bulbs causing electrical interference
- Verify the condition of the lift pump in the tank, as it may cause fuel pressure starvation
Final fix
- Replaced pins (terminals) in ECM connector for the fuel pressure regulator, resolving the issue.
Case #2: Ford P0092
Vehicle information
2015 Ford F-150 XLT 3.5L EcoBoost
Issue + repair history
- Vehicle experiences intermittent loss of power with the check engine light on
- DTC P0092 consistently sets for Fuel Pressure Regulator 1 Control Circuit High
- High pressure fuel pump replaced
- Fuel pressure sensor replaced
- Wiring harness inspected for damage
Other OBD2 Codes + Test Results
- DTC P0092: Fuel Pressure Regulator 1 Control Circuit High
Mechanic suggestions
- Verify the integrity of the wiring harness and connectors for the fuel pressure regulator
- Inspect the fuel pressure regulator for proper operation and replace if necessary
- Check for any aftermarket modifications affecting the fuel system
- Perform a voltage drop test on the circuit to identify any issues with high resistance
Final fix
- Discovered a corroded connector pin at the fuel pressure regulator, replaced the connector and repaired the wiring, resolving the issue.
Case #3: Chevrolet P0092
Vehicle information
2012 Chevrolet Silverado 2500HD LTZ 6.6L Duramax
Issue + repair history
- Vehicle exhibits rough idle and loss of power intermittently
- DTC P0092 sets for Fuel Pressure Regulator 1 Control Circuit High
- Fuel filter replaced
- High pressure fuel pump inspected for proper operation
- Fuel pressure sensor checked for accuracy
Other OBD2 Codes + Test Results
- DTC P0092: Fuel Pressure Regulator 1 Control Circuit High
Mechanic suggestions
- Perform a thorough inspection of the wiring harness and connectors for any signs of damage or corrosion
- Test the fuel pressure regulator’s operation and replace if necessary
- Check for any aftermarket modifications affecting the fuel system
- Conduct a voltage drop test on the circuit to identify any areas of high resistance
Final fix
- Found a damaged wire in the harness leading to the fuel pressure regulator, repaired the wire, and cleared the DTC, resolving the issue.
How to diagnose P0092
I made you an overview of solving this DTC, based on all the advice that was suggested by certified mechanics to address this issue in previously mentioned service cases.
| Diagnostic Step | Brief Explanation |
|---|---|
| Inspect wiring and connectors | Checks for any electrical issues that might cause high voltage. |
| Test fuel pressure regulator | Ensures the regulator is functioning correctly. |
| Monitor fuel pressure | Compares actual fuel pressure against what the system expects. |
| Repair or replace damaged components | Fixes or swaps out faulty parts like connectors, wires, or the regulator itself. |
Car Diagnostics Training
- Car Electrical basics
- OBD-II scanner basics
- How to use an OBD reader
- Introduction to a Bi-directional Scan tool
- OBD scanner buyer’s guide + discounts
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko