P0192 OBD Error Code: Problem & Solutions

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If you notice loss of acceleration, engine stalling and hesitation during response, cranks and Check Engine Light illuminated, it may be due to problem with the fuel delivery system thus leading to OBD code P0192 being stored in the Powertrain Control Module.

 

P0192 is defined by problem of Fuel Rail Pressure Sensor Circuit Low Input.

This code is stored in the PCM when the incoming signal from the FRP sensor falls below the particular limit for a particular amount of time.

 

When the ECM/PCM detects a problem with the fuel rail pressure sensor (RPS), such as insufficient or excessive voltage feedback, or an open or short circuit, it locks out the high-pressure pump and put the engine into limp-home mode. The MIL (malfunction indicator lamp) gets illuminated, and a DTC (diagnostic trouble code) is set in ECM/PCM memory.

 

What causes the problem of Fuel Rail Pressure Sensor Circuit Low Input?

 

• Low fuel levels
• Bad Fuel Rail Pressure (FRP) Sensor
• FRP harness is open or shorted
• FRP circuit poor electrical connection
• Faulty/damaged Fuel Pump
• Faulty/damaged fuel pump relay
• Clogged/damaged fuel filter

1. Fuel Pressure Regulator - A faulty regulator will affect the fuel delivery system as the PCM will not be able to interpret the correct amount of fuel needed by the engine to give maximum output. Thus, replace if the fuel pressure regulator is faulty or damaged.
2. Fuel Pump - If the fuel pump is not performing properly, it means that you’ll have to face direct issues with the engine performance. Loss of acceleration, rough idles, stalling and increased internal combustion temperatures are basic side effects. Replace it now!
3. Fuel Filter - Fuel filters keep the foreign particles from entering the combustion chamber as they can harm the engine badly. This helps clean fuel from entering the engine to give maximum output. Replace damaged filters and clean, if clogged.
4. Fuel Pump Relay - The fuel pump relay helps to determine the oil pressure and thus the proper functioning of the fuel pump. Buy new pump relays now!
5. Fuel Pump Fuse - Sometimes blown fuses can be the cause of component breakdown. Always check for blown fuses first during the diagnosis. Buy now!
6. Fuel Pressure Sensor - Bad sensor will not be able to correctly read the fuel pressure as it enters the engine and thus the PCM will not be able to control the function properly. Buy new sensors and replace faulty parts as necessary.
7. Fuel Pressure Gauge - Check if the gauge the reading the sensor data properly. If not, replace it to check for the correct reading.
8. Fuel Line Assembly - Any fault in the fuel line assembly can cause the fuel pressure loss and thus hamper the performance. Replace damaged fuel line assembly components today!
9. Diagnostic Tools - Factory grade diagnostic tools are necessary to detect and diagnose the OBD error code. Buy quality diagnostic tools form us now!

This fault may cause reduced power, the engine may run rough, or the engine may crank but not start. There is typically an illuminated Check Engine light as well. At Parts Avatar Canada, get genuine replacement parts and performance parts for your vehicle. This error may also indicate problems that will likely affect:

 

Common Symptoms

 

• Low engine power
• Poor drivability
• Reduced fuel economy
• Abnormal throttle response
• General reduction in efficiency
• Alteration in power bands

• Check and add fuel to a low or empty fuel tank
• Repairing or replacing wiring and/or connectors that are corroded
• Repairing or replacing wiring that is shorted, broken, or frayed
• Replacing clogged fuel filter
• Replacing fuel pump relay
• Replacing fuel pump fuse
• Replacement of the fuel pump
• Replacement of the fuel rail pressure sensor

We have stocked a wide range of best priced ECM/PCM parts, Ford & Mazda transmission, Car harness/wiring, solenoids, multimeter, fuel pressure regulators and a lot more to help you out in fixing your car.

• Inspect the fuel rail pressure sensor wiring and connectors. They will check for burned or shorted wires and connectors that are corroded. If necessary, replace the connectors and circuitry.
• Collect freeze frame data and the trouble codes stored by the power control module (PCM), Using an OBD-II scanner
• Clears the trouble codes and perform a test drive to see if any codes come returns. There could be an intermittent problem if the trouble code P0192 does not return immediately.
• If the test drive cannot be performed because the car won’t start, then test the fuel pressure with a fuel pressure gauge.
• A low fuel pressure reading could be an indication that the vehicle is out of gas/fuel. It is important to make sure there is gas/fuel in the car during this step in the diagnosis process.
• After checking that there is gas in the car, make sure the fuel pump is operating by listening to it. If the fuel pump is operating, but the car does not start, it could indicate that a fuel filter is clogged, there’s an issue with the fuel injector circuits, or that the power control module (PCM) is faulty.
• If you can’t hear the fuel pump, tap on the fuel tank while simultaneously attempting to start the car. This step will require two people.
• Car not starting is an indication that the fuel pump is faulty. Also check for the battery voltage at the fuel pump connector.
• If there is no battery voltage reading at the fuel pump connector, the fuse circuit, fuel pump relay circuit, and power control module (PCM) circuit should be inspected. If the fuse, fuel pump relay, and power control module (PCM) circuits are not working properly, inspect the fuel rail pressure sensor.
• Fuel rail pressure sensor is tested for a reference voltage at the connector with a digital volt ohmmeter. A good reference voltage reading is 5-volts and this should be tested when the car is running.
• The next step would be to test the sensor ground wire, if the fuel rail pressure sensor has a 5-volt reading.
• If the results show a reference signal and ground signal, the sensor’s resistance will need to be tested. Use the manufacturer’s pressure-to-resistance chart to make a determination as to whether the fuel rail pressure sensor needs to be replaced.
• Fuel system is retested to make sure it is working properly. If the circuitry and sensors are operational, it is possible that there is a problem with the power control module (PCM). This is not common but would require replacing and reprogramming the power control module (PCM).

Common Mistakes When Diagnosing The P0192 Code

 

Oftentimes the FRP sensor is blamed, and replaced, without checking the fuel pump or wirings for damage or stretching. Because there can be several causes for this code, a complete inspection should be carried out in order to avoid repairs that may be unnecessary and more expensive.