The automobile fault code P1185 indicates a problem with the fuel pressure in the engine. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

The cause of this fault code can be a faulty Fuel Pressure Regulator Valve (FPRV) stuck open, a faulty Fuel Rail Pressure Sensor (RPS), an open or shorted Fuel Rail Pressure Sensor harness, or a poor electrical connection in the Fuel Rail Pressure Sensor circuit. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion.

Additionally, look for any broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this issue is estimated to be around 1.0 hour.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you see the Engine Light ON or the Service Engine Soon Warning Light, it could be due to the p1185 fault code.

  • The symptoms of the automobile fault code P1185 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code P1185 can be caused by a faulty Fuel Pressure Regulator Valve (FPRV), a faulty Fuel Rail Pressure Sensor (RPS), an open or shorted Fuel Rail Pressure Sensor harness, or a poor electrical connection in the Fuel Rail Pressure Sensor circuit.

  • The fault code P1185 can be caused by the following: a faulty Fuel Pressure Regulator Valve (FPRV) stuck open, a faulty Fuel Rail Pressure Sensor (RPS), an open or shorted Fuel Rail Pressure Sensor harness, or a poor electrical connection in the Fuel Rail Pressure Sensor circuit.

To fix the automobile fault code p1185, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P1185, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • This fix is estimated to take approximately 1.0 hour.

The automobile fault code P1185 diagnosis and fixing cost is influenced by the estimated repair time of 1.0 hour.

Most auto repair shops typically charge between $75 and $150 per hour for their services.

The P1185 fault code is related to the fuel pressure in a standard rail diesel engine. The Engine Control Module (ECM) monitors the input rail pressure sensor signal to control the Fuel Pressure Regulator Valve.

This valve helps maintain the optimum rail pressure based on the engine’s current rpm and load. However, if there is a problem that causes the rail pressure to deviate from the target value set by the ECM, the engine will be shut down, and the P1185 code will be set. The P1185 code indicates a “Fuel Pressure Monitoring-Maximum Pressure Ex.” This means that the ECM has detected that the fuel pressure has exceeded the maximum allowable limit.

This can be caused by issues such as a low-pressure fuel supply, mechanical problems with the high-pressure pump, or abnormalities in the Rail Pressure Sensor (RPS) output voltage and duty.

When this fault code is triggered, the ECM limits the fuel supply by stopping injector operation to prevent any abnormal engine control.

What are the possible causes for the automobile fault code P1185?

If you see the engine light on or the service engine soon warning light, the fault code P1185 could be the culprit. This code is often caused by a faulty fuel pressure regulator valve (FPRV) stuck open, a faulty fuel rail pressure sensor (RPS), an open or shorted fuel rail pressure sensor harness, or a poor electrical connection in the fuel rail pressure sensor circuit. To fix this issue, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix the P1185 fault code?

If you’re dealing with the P1185 fault code and your engine light is on, it’s time to take action. The cause could be a faulty fuel pressure regulator valve (FPRV), a faulty fuel rail pressure sensor (RPS), an open or shorted fuel rail pressure sensor harness, or a poor electrical connection in the sensor circuit. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any signs of damage, such as broken or bent pins, corrosion, or components that are out of place. Don’t delay – check these possible causes and get your vehicle back on track.

What should I look for when checking for damaged components or corroded connector pins to resolve the P1185 fault code?

When resolving the P1185 fault code, start by checking for damaged components or corroded connector pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any broken, bent, pushed out, or corroded pins on the connectors. By doing this, you can identify any issues that may be causing the fault code and take the necessary steps to fix them.

p1185 error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, it could be due to a faulty Fuel Pressure Regulator Valve (FPRV) stuck open, a faulty Fuel Rail Pressure Sensor (RPS), or issues with the Fuel Rail Pressure Sensor harness. To fix this, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

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